From 8ede1a2ecbb62577afd32996956c5feaf7ddf9b6 Mon Sep 17 00:00:00 2001 From: Derek Jones Date: Wed, 5 Oct 2011 13:34:52 -0500 Subject: replacing the old HTML user guide with a Sphinx-managed user guide --- user_guide_src/source/helpers/array_helper.rst | 139 ++++++ user_guide_src/source/helpers/captcha_helper.rst | 156 +++++++ user_guide_src/source/helpers/cookie_helper.rst | 78 ++++ user_guide_src/source/helpers/date_helper.rst | 457 +++++++++++++++++++ user_guide_src/source/helpers/directory_helper.rst | 81 ++++ user_guide_src/source/helpers/download_helper.rst | 42 ++ user_guide_src/source/helpers/email_helper.rst | 49 ++ user_guide_src/source/helpers/file_helper.rst | 135 ++++++ user_guide_src/source/helpers/form_helper.rst | 506 +++++++++++++++++++++ user_guide_src/source/helpers/html_helper.rst | 348 ++++++++++++++ user_guide_src/source/helpers/index.rst | 9 + user_guide_src/source/helpers/inflector_helper.rst | 79 ++++ user_guide_src/source/helpers/language_helper.rst | 33 ++ user_guide_src/source/helpers/number_helper.rst | 45 ++ user_guide_src/source/helpers/path_helper.rst | 37 ++ user_guide_src/source/helpers/security_helper.rst | 67 +++ user_guide_src/source/helpers/smiley_helper.rst | 160 +++++++ user_guide_src/source/helpers/string_helper.rst | 167 +++++++ user_guide_src/source/helpers/text_helper.rst | 164 +++++++ .../source/helpers/typography_helper.rst | 48 ++ user_guide_src/source/helpers/url_helper.rst | 313 +++++++++++++ user_guide_src/source/helpers/xml_helper.rst | 38 ++ 22 files changed, 3151 insertions(+) create mode 100644 user_guide_src/source/helpers/array_helper.rst create mode 100644 user_guide_src/source/helpers/captcha_helper.rst create mode 100644 user_guide_src/source/helpers/cookie_helper.rst create mode 100644 user_guide_src/source/helpers/date_helper.rst create mode 100644 user_guide_src/source/helpers/directory_helper.rst create mode 100644 user_guide_src/source/helpers/download_helper.rst create mode 100644 user_guide_src/source/helpers/email_helper.rst create mode 100644 user_guide_src/source/helpers/file_helper.rst create mode 100644 user_guide_src/source/helpers/form_helper.rst create mode 100644 user_guide_src/source/helpers/html_helper.rst create mode 100644 user_guide_src/source/helpers/index.rst create mode 100644 user_guide_src/source/helpers/inflector_helper.rst create mode 100644 user_guide_src/source/helpers/language_helper.rst create mode 100644 user_guide_src/source/helpers/number_helper.rst create mode 100644 user_guide_src/source/helpers/path_helper.rst create mode 100644 user_guide_src/source/helpers/security_helper.rst create mode 100644 user_guide_src/source/helpers/smiley_helper.rst create mode 100644 user_guide_src/source/helpers/string_helper.rst create mode 100644 user_guide_src/source/helpers/text_helper.rst create mode 100644 user_guide_src/source/helpers/typography_helper.rst create mode 100644 user_guide_src/source/helpers/url_helper.rst create mode 100644 user_guide_src/source/helpers/xml_helper.rst (limited to 'user_guide_src/source/helpers') diff --git a/user_guide_src/source/helpers/array_helper.rst b/user_guide_src/source/helpers/array_helper.rst new file mode 100644 index 000000000..4308753bb --- /dev/null +++ b/user_guide_src/source/helpers/array_helper.rst @@ -0,0 +1,139 @@ +############ +Array Helper +############ + +The Array Helper file contains functions that assist in working with +arrays. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('array'); + +The following functions are available: + +element() +========= + +.. php:method:: element($item, $array, $default = FALSE) + + :param string $item: Item to fetch from the array + :param array $array: Input array + :param boolean $default: What to return if the array isn't valid + :returns: FALSE on failure or the array item. + + +Lets you fetch an item from an array. The function tests whether the +array index is set and whether it has a value. If a value exists it is +returned. If a value does not exist it returns FALSE, or whatever you've +specified as the default value via the third parameter. Example + +:: + + $array = array( + 'color' => 'red', + 'shape' => 'round', + 'size' => '' + ); + + echo element('color', $array); // returns "red" + echo element('size', $array, NULL); // returns NULL + +elements() +========== + +Lets you fetch a number of items from an array. The function tests +whether each of the array indices is set. If an index does not exist it +is set to FALSE, or whatever you've specified as the default value via +the third parameter. + +.. php:method:: elements($items, $array, $default = FALSE) + + :param string $item: Item to fetch from the array + :param array $array: Input array + :param boolean $default: What to return if the array isn't valid + :returns: FALSE on failure or the array item. + +Example + +:: + + $array = array( + 'color' => 'red',   + 'shape' => 'round',      + 'radius' => '10',      + 'diameter' => '20' + ); + + $my_shape = elements(array('color', 'shape', 'height'), $array); + +The above will return the following array + +:: + + array( + 'color' => 'red',      + 'shape' => 'round',      + 'height' => FALSE + ); + +You can set the third parameter to any default value you like + +:: + + $my_shape = elements(array('color', 'shape', 'height'), $array, NULL); + +The above will return the following array + +:: + + array(      + 'color' => 'red',      + 'shape' => 'round',      + 'height' => NULL + ); + +This is useful when sending the $_POST array to one of your Models. +This prevents users from sending additional POST data to be entered into +your tables + +:: + + $this->load->model('post_model'); + $this->post_model->update( + elements(array('id', 'title', 'content'), $_POST) + ); + +This ensures that only the id, title and content fields are sent to be +updated. + +random_element() +================ + +Takes an array as input and returns a random element from it. Usage +example + +.. php:method:: random_element($array) + + :param array $array: Input array + :returns: String - Random element from the array. + +:: + + $quotes = array( + "I find that the harder I work, the more luck I seem to have. - Thomas Jefferson", + "Don't stay in bed, unless you can make money in bed. - George Burns", + "We didn't lose the game; we just ran out of time. - Vince Lombardi", + "If everything seems under control, you're not going fast enough. - Mario Andretti", + "Reality is merely an illusion, albeit a very persistent one. - Albert Einstein", + "Chance favors the prepared mind - Louis Pasteur" + ); + + echo random_element($quotes); + diff --git a/user_guide_src/source/helpers/captcha_helper.rst b/user_guide_src/source/helpers/captcha_helper.rst new file mode 100644 index 000000000..48095a11d --- /dev/null +++ b/user_guide_src/source/helpers/captcha_helper.rst @@ -0,0 +1,156 @@ +############## +CAPTCHA Helper +############## + +The CAPTCHA Helper file contains functions that assist in creating +CAPTCHA images. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('captcha'); + +The following functions are available: + +create_captcha($data) +===================== + +Takes an array of information to generate the CAPTCHA as input and +creates the image to your specifications, returning an array of +associative data about the image. + +.. php:method:: function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '') + + :param array $data: array of data for the CAPTCHA + :param string $img_path: path to create the image in + :param string $img_url: URL to the CAPTCHA image folder + :param string $font_path: server path to font + :returns: array('word' => $word, 'time' => $now, 'image' => $img) + + +:: + + [array] ( + 'image' => IMAGE TAG    + 'time' => TIMESTAMP (in microtime)    + 'word' => CAPTCHA WORD ) + +The "image" is the actual image tag: + +:: + + + + +The "time" is the micro timestamp used as the image name without the +file extension. It will be a number like this: 1139612155.3422 + +The "word" is the word that appears in the captcha image, which if not +supplied to the function, will be a random string. + +Using the CAPTCHA helper +------------------------ + +Once loaded you can generate a captcha like this + +:: + + $vals = array(      + 'word' => 'Random word',      + 'img_path' => './captcha/',      + 'img_url' => 'http://example.com/captcha/',      + 'font_path' => './path/to/fonts/texb.ttf',      + 'img_width' => '150',      + 'img_height' => 30,      + 'expiration' => 7200      + ); + + $cap = create_captcha($vals); echo $cap['image']; + + +- The captcha function requires the GD image library. +- Only the img_path and img_url are required. +- If a "word" is not supplied, the function will generate a random + ASCII string. You might put together your own word library that you + can draw randomly from. +- If you do not specify a path to a TRUE TYPE font, the native ugly GD + font will be used. +- The "captcha" folder must be writable (666, or 777) +- The "expiration" (in seconds) signifies how long an image will remain + in the captcha folder before it will be deleted. The default is two + hours. + +Adding a Database +----------------- + +In order for the captcha function to prevent someone from submitting, +you will need to add the information returned from create_captcha() +function to your database. Then, when the data from the form is +submitted by the user you will need to verify that the data exists in +the database and has not expired. + +Here is a table prototype + +:: + + CREATE TABLE captcha (   + captcha_id bigint(13) unsigned NOT NULL auto_increment,   + captcha_time int(10) unsigned NOT NULL,   + ip_address varchar(16) default '0' NOT NULL,   + word varchar(20) NOT NULL,   + PRIMARY KEY `captcha_id` (`captcha_id`),   + KEY `word` (`word`) + ); + +Here is an example of usage with a database. On the page where the +CAPTCHA will be shown you'll have something like this + +:: + + $this->load->helper('captcha'); + $vals = array(      + 'img_path' => './captcha/',      + 'img_url' => 'http://example.com/captcha/'      + ); + + $cap = create_captcha($vals); + $data = array(      + 'captcha_time' => $cap['time'],      + 'ip_address' => $this->input->ip_address(),      + 'word' => $cap['word']      + ); + + $query = $this->db->insert_string('captcha', $data); + $this->db->query($query); + + echo 'Submit the word you see below:'; + echo $cap['image']; + echo ''; + +Then, on the page that accepts the submission you'll have something like +this + +:: + + // First, delete old captchas + $expiration = time() - 7200; // Two hour limit + $this->db->where('captcha_time < ', $expiration) + ->delete('captcha'); + + // Then see if a captcha exists: + $sql = "SELECT COUNT(*) AS count FROM captcha WHERE word = ? AND ip_address = ? AND captcha_time > ?"; + $binds = array($_POST['captcha'], $this->input->ip_address(), $expiration); + $query = $this->db->query($sql, $binds); + $row = $query->row(); + + if ($row->count == 0) + {      + echo "You must submit the word that appears in the image"; + } + diff --git a/user_guide_src/source/helpers/cookie_helper.rst b/user_guide_src/source/helpers/cookie_helper.rst new file mode 100644 index 000000000..30e601c32 --- /dev/null +++ b/user_guide_src/source/helpers/cookie_helper.rst @@ -0,0 +1,78 @@ +############# +Cookie Helper +############# + +The Cookie Helper file contains functions that assist in working with +cookies. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('cookie'); + +The following functions are available: + +set_cookie() +============ + +This helper function gives you view file friendly syntax to set browser +cookies. Refer to the :doc:`Input class <../libraries/input>` for a +description of use, as this function is an alias to +`$this->input->set_cookie()`. + +.. php:method:: set_cookie($name = '', $value = '', $expire = '', $domain = '', $path = '/', $prefix = '', $secure = FALSE) + + :param string $name: the name of the cookie + :param string $value: the value of the cookie + :param string $expire: the number of seconds until expiration + :param string $domain: the cookie domain. Usually: .yourdomain.com + :param string $path: the cookie path + :param string $prefix: the cookie prefix + :param boolean $secure: secure cookie or not. + :returns: void + +get_cookie() +============ + +This helper function gives you view file friendly syntax to get browser +cookies. Refer to the :doc:`Input class <../libraries/input>` for a +description of use, as this function is an alias to `$this->input->cookie()`. + +.. php:method:: get_cookie($index = '', $xss_clean = FALSE) + + :param string $index: the name of the cookie + :param boolean $xss_clean: If the resulting value should be xss_cleaned or not + :returns: mixed + +delete_cookie() +=============== + +Lets you delete a cookie. Unless you've set a custom path or other +values, only the name of the cookie is needed + +.. php:method:: delete_cookie($name = '', $domain = '', $path = '/', $prefix = '') + + :param string $name: the name of the cookie + :param string $domain: cookie domain (ususally .example.com) + :param string $path: cookie path + :param string $prefix: cookie prefix + :returns: void + +:: + + delete_cookie("name"); + +This function is otherwise identical to ``set_cookie()``, except that it +does not have the value and expiration parameters. You can submit an +array of values in the first parameter or you can set discrete +parameters. + +:: + + delete_cookie($name, $domain, $path, $prefix) \ No newline at end of file diff --git a/user_guide_src/source/helpers/date_helper.rst b/user_guide_src/source/helpers/date_helper.rst new file mode 100644 index 000000000..378ff362b --- /dev/null +++ b/user_guide_src/source/helpers/date_helper.rst @@ -0,0 +1,457 @@ +########### +Date Helper +########### + +The Date Helper file contains functions that help you work with dates. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('date'); + +The following functions are available: + +now() +===== + +Returns the current time as a Unix timestamp, referenced either to your +server's local time or GMT, based on the "time reference" setting in +your config file. If you do not intend to set your master time reference +to GMT (which you'll typically do if you run a site that lets each user +set their own timezone settings) there is no benefit to using this +function over PHP's time() function. + +.. php:method:: now() + +mdate() +======= + +This function is identical to PHPs `date() `_ +function, except that it lets you use MySQL style date codes, where each +code letter is preceded with a percent sign: %Y %m %d etc. + +The benefit of doing dates this way is that you don't have to worry +about escaping any characters that are not date codes, as you would +normally have to do with the date() function. Example + +.. php:method:: mdate($datestr = '', $time = '') + + :param string $datestr: Date String + :param integer $time: time + :returns: integer + + +:: + + $datestring = "Year: %Y Month: %m Day: %d - %h:%i %a"; + $time = time(); + echo mdate($datestring, $time); + +If a timestamp is not included in the second parameter the current time +will be used. + +standard_date() +=============== + +Lets you generate a date string in one of several standardized formats. +Example + +.. php:method:: standard_date($fmt = 'DATE_RFC822', $time = '') + + :param string $fmt: the chosen format + :param string $time: Unix timestamp + :returns: string + +:: + + $format = 'DATE_RFC822'; + $time = time(); + echo standard_date($format, $time); + +The first parameter must contain the format, the second parameter must +contain the date as a Unix timestamp. + +Supported formats: + ++----------------+------------------------+-----------------------------------+ +| Constant | Description | Example | ++================+========================+===================================+ +| DATE_ATOM | Atom | 2005-08-15T16:13:03+0000 | ++----------------+------------------------+-----------------------------------+ +| DATE_COOKIE | HTTP Cookies | Sun, 14 Aug 2005 16:13:03 UTC | ++----------------+------------------------+-----------------------------------+ +| DATE_ISO8601 | ISO-8601 | 2005-08-14T16:13:03+00:00 | ++----------------+------------------------+-----------------------------------+ +| DATE_RFC822 | RFC 822 | Sun, 14 Aug 05 16:13:03 UTC | ++----------------+------------------------+-----------------------------------+ +| DATE_RFC850 | RFC 850 | Sunday, 14-Aug-05 16:13:03 UTC | ++----------------+------------------------+-----------------------------------+ +| DATE_RFC1036 | RFC 1036 | Sunday, 14-Aug-05 16:13:03 UTC | ++----------------+------------------------+-----------------------------------+ +| DATE_RFC1123 | RFC 1123 | Sun, 14 Aug 2005 16:13:03 UTC | ++----------------+------------------------+-----------------------------------+ +| DATE_RFC2822 | RFC 2822 | Sun, 14 Aug 2005 16:13:03 +0000 | ++----------------+------------------------+-----------------------------------+ +| DATE_RSS | RSS | Sun, 14 Aug 2005 16:13:03 UTC | ++----------------+------------------------+-----------------------------------+ +| DATE_W3C | W3C | 2005-08-14T16:13:03+0000 | ++----------------+------------------------+-----------------------------------+ + + +local_to_gmt() +============== + +Takes a Unix timestamp as input and returns it as GMT. + +.. php:method:: local_to_gmt($time = '') + + :param integer $time: Unix timestamp + :returns: string + +Example: + +:: + + $now = time(); + $gmt = local_to_gmt($now); + +gmt_to_local() +============== + +Takes a Unix timestamp (referenced to GMT) as input, and converts it to +a localized timestamp based on the timezone and Daylight Saving time +submitted. + +.. php:method:: gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE) + + :param integer $time: Unix timestamp + :param string $timezone: timezone + :param boolean $dst: whether DST is active + :returns: integer + +Example + +:: + + $timestamp = '1140153693'; + $timezone = 'UM8'; + $daylight_saving = TRUE; + echo gmt_to_local($timestamp, $timezone, $daylight_saving); + + +.. note:: For a list of timezones see the reference at the bottom of this page. + + +mysql_to_unix() +=============== + +Takes a MySQL Timestamp as input and returns it as Unix. + +.. php:method:: mysql_to_unix($time = '') + + :param integer $time: Unix timestamp + :returns: integer + +Example + +:: + + $mysql = '20061124092345'; $unix = mysql_to_unix($mysql); + +unix_to_human() +=============== + +Takes a Unix timestamp as input and returns it in a human readable +format with this prototype + +.. php:method:: unix_to_human($time = '', $seconds = FALSE, $fmt = 'us') + + :param integer $time: Unix timestamp + :param boolean $seconds: whether to show seconds + :param string $fmt: format: us or euro + :returns: integer + +Example + +:: + + YYYY-MM-DD HH:MM:SS AM/PM + +This can be useful if you need to display a date in a form field for +submission. + +The time can be formatted with or without seconds, and it can be set to +European or US format. If only the timestamp is submitted it will return +the time without seconds formatted for the U.S. Examples + +:: + + $now = time(); + echo unix_to_human($now); // U.S. time, no seconds + echo unix_to_human($now, TRUE, 'us'); // U.S. time with seconds + echo unix_to_human($now, TRUE, 'eu'); // Euro time with seconds + +human_to_unix() +=============== + +The opposite of the above function. Takes a "human" time as input and +returns it as Unix. This function is useful if you accept "human" +formatted dates submitted via a form. Returns FALSE (boolean) if the +date string passed to it is not formatted as indicated above. + +.. php:method:: human_to_unix($datestr = '') + + :param integer $datestr: Date String + :returns: integer + +Example: + +:: + + $now = time(); + $human = unix_to_human($now); + $unix = human_to_unix($human); + +nice_date() +=========== + +This function can take a number poorly-formed date formats and convert +them into something useful. It also accepts well-formed dates. + +The function will return a Unix timestamp by default. You can, +optionally, pass a format string (the same type as the PHP date function +accepts) as the second parameter. + +.. php:method:: nice_date($bad_date = '', $format = FALSE) + + :param integer $bad_date: The terribly formatted date-like string + :param string $format: Date format to return (same as php date function) + :returns: string + +Example + +:: + + $bad_time = 199605 // Should Produce: 1996-05-01 + $better_time = nice_date($bad_time,'Y-m-d'); + $bad_time = 9-11-2001 // Should Produce: 2001-09-11 + $better_time = nice_date($human,'Y-m-d'); + +timespan() +========== + +Formats a unix timestamp so that is appears similar to this + +:: + + 1 Year, 10 Months, 2 Weeks, 5 Days, 10 Hours, 16 Minutes + +The first parameter must contain a Unix timestamp. The second parameter +must contain a timestamp that is greater that the first timestamp. If +the second parameter empty, the current time will be used. The most +common purpose for this function is to show how much time has elapsed +from some point in time in the past to now. + +.. php:method:: timespan($seconds = 1, $time = '') + + :param integer $seconds: a number of seconds + :param string $time: Unix timestamp + :returns: string + +Example + +:: + + $post_date = '1079621429'; + $now = time(); + echo timespan($post_date, $now); + +.. note:: The text generated by this function is found in the following language + file: language//date_lang.php + +days_in_month() +=============== + +Returns the number of days in a given month/year. Takes leap years into +account. + +.. php:method:: days_in_month($month = 0, $year = '') + + :param integer $month: a numeric month + :param integer $year: a numeric year + :returns: integer + +Example + +:: + + echo days_in_month(06, 2005); + +If the second parameter is empty, the current year will be used. + +timezones() +=========== + +Takes a timezone reference (for a list of valid timezones, see the +"Timezone Reference" below) and returns the number of hours offset from +UTC. + +.. php:method:: timezones($tz = '') + + :param string $tz: a numeric timezone + :returns: string + +Example + +:: + + echo timezones('UM5'); + + +This function is useful when used with `timezone_menu()`. + +timezone_menu() +=============== + +Generates a pull-down menu of timezones, like this one: + + +.. raw:: html + +
+ +
+ + +This menu is useful if you run a membership site in which your users are +allowed to set their local timezone value. + +The first parameter lets you set the "selected" state of the menu. For +example, to set Pacific time as the default you will do this + +.. php:method:: timezone_menu($default = 'UTC', $class = "", $name = 'timezones') + + :param string $default: timezone + :param string $class: classname + :param string $name: menu name + :returns: string + +Example: + +:: + + echo timezone_menu('UM8'); + +Please see the timezone reference below to see the values of this menu. + +The second parameter lets you set a CSS class name for the menu. + +.. note:: The text contained in the menu is found in the following + language file: `language//date_lang.php` + + +Timezone Reference +================== + +The following table indicates each timezone and its location. + ++------------+----------------------------------------------------------------+ +| Time Zone | Location | ++============+================================================================+ +| UM12 | (UTC - 12:00) Enitwetok, Kwajalien | ++------------+----------------------------------------------------------------+ +| UM11 | (UTC - 11:00) Nome, Midway Island, Samoa | ++------------+----------------------------------------------------------------+ +| UM10 | (UTC - 10:00) Hawaii | ++------------+----------------------------------------------------------------+ +| UM9 | (UTC - 9:00) Alaska | ++------------+----------------------------------------------------------------+ +| UM8 | (UTC - 8:00) Pacific Time | ++------------+----------------------------------------------------------------+ +| UM7 | (UTC - 7:00) Mountain Time | ++------------+----------------------------------------------------------------+ +| UM6 | (UTC - 6:00) Central Time, Mexico City | ++------------+----------------------------------------------------------------+ +| UM5 | (UTC - 5:00) Eastern Time, Bogota, Lima, Quito | ++------------+----------------------------------------------------------------+ +| UM4 | (UTC - 4:00) Atlantic Time, Caracas, La Paz | ++------------+----------------------------------------------------------------+ +| UM25 | (UTC - 3:30) Newfoundland | ++------------+----------------------------------------------------------------+ +| UM3 | (UTC - 3:00) Brazil, Buenos Aires, Georgetown, Falkland Is. | ++------------+----------------------------------------------------------------+ +| UM2 | (UTC - 2:00) Mid-Atlantic, Ascention Is., St Helena | ++------------+----------------------------------------------------------------+ +| UM1 | (UTC - 1:00) Azores, Cape Verde Islands | ++------------+----------------------------------------------------------------+ +| UTC | (UTC) Casablanca, Dublin, Edinburgh, London, Lisbon, Monrovia | ++------------+----------------------------------------------------------------+ +| UP1 | (UTC + 1:00) Berlin, Brussels, Copenhagen, Madrid, Paris, Rome | ++------------+----------------------------------------------------------------+ +| UP2 | (UTC + 2:00) Kaliningrad, South Africa, Warsaw | ++------------+----------------------------------------------------------------+ +| UP3 | (UTC + 3:00) Baghdad, Riyadh, Moscow, Nairobi | ++------------+----------------------------------------------------------------+ +| UP25 | (UTC + 3:30) Tehran | ++------------+----------------------------------------------------------------+ +| UP4 | (UTC + 4:00) Adu Dhabi, Baku, Muscat, Tbilisi | ++------------+----------------------------------------------------------------+ +| UP35 | (UTC + 4:30) Kabul | ++------------+----------------------------------------------------------------+ +| UP5 | (UTC + 5:00) Islamabad, Karachi, Tashkent | ++------------+----------------------------------------------------------------+ +| UP45 | (UTC + 5:30) Bombay, Calcutta, Madras, New Delhi | ++------------+----------------------------------------------------------------+ +| UP6 | (UTC + 6:00) Almaty, Colomba, Dhaka | ++------------+----------------------------------------------------------------+ +| UP7 | (UTC + 7:00) Bangkok, Hanoi, Jakarta | ++------------+----------------------------------------------------------------+ +| UP8 | (UTC + 8:00) Beijing, Hong Kong, Perth, Singapore, Taipei | ++------------+----------------------------------------------------------------+ +| UP9 | (UTC + 9:00) Osaka, Sapporo, Seoul, Tokyo, Yakutsk | ++------------+----------------------------------------------------------------+ +| UP85 | (UTC + 9:30) Adelaide, Darwin | ++------------+----------------------------------------------------------------+ +| UP10 | (UTC + 10:00) Melbourne, Papua New Guinea, Sydney, Vladivostok | ++------------+----------------------------------------------------------------+ +| UP11 | (UTC + 11:00) Magadan, New Caledonia, Solomon Islands | ++------------+----------------------------------------------------------------+ +| UP12 | (UTC + 12:00) Auckland, Wellington, Fiji, Marshall Island | ++------------+----------------------------------------------------------------+ diff --git a/user_guide_src/source/helpers/directory_helper.rst b/user_guide_src/source/helpers/directory_helper.rst new file mode 100644 index 000000000..6c259adb1 --- /dev/null +++ b/user_guide_src/source/helpers/directory_helper.rst @@ -0,0 +1,81 @@ +################ +Directory Helper +################ + +The Directory Helper file contains functions that assist in working with +directories. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('directory'); + +The following functions are available: + +directory_map('source directory') +================================= + +This function reads the directory path specified in the first parameter +and builds an array representation of it and all its contained files. + +Example + +:: + + $map = directory_map('./mydirectory/'); + +.. note:: Paths are almost always relative to your main index.php file. + + +Sub-folders contained within the directory will be mapped as well. If +you wish to control the recursion depth, you can do so using the second +parameter (integer). A depth of 1 will only map the top level directory + +:: + + $map = directory_map('./mydirectory/', 1); + +By default, hidden files will not be included in the returned array. To +override this behavior, you may set a third parameter to true (boolean) + +:: + + $map = directory_map('./mydirectory/', FALSE, TRUE); + +Each folder name will be an array index, while its contained files will +be numerically indexed. Here is an example of a typical array + +:: + + Array (     + [libraries] => Array     + (         + [0] => benchmark.html         + [1] => config.html         + [database] => Array + (               + [0] => active_record.html               + [1] => binds.html               + [2] => configuration.html + [3] => connecting.html               + [4] => examples.html               + [5] => fields.html               + [6] => index.html + [7] => queries.html + )         + [2] => email.html         + [3] => file_uploading.html         + [4] => image_lib.html         + [5] => input.html         + [6] => language.html         + [7] => loader.html         + [8] => pagination.html         + [9] => uri.html + ) + diff --git a/user_guide_src/source/helpers/download_helper.rst b/user_guide_src/source/helpers/download_helper.rst new file mode 100644 index 000000000..e6094dc6b --- /dev/null +++ b/user_guide_src/source/helpers/download_helper.rst @@ -0,0 +1,42 @@ +############### +Download Helper +############### + +The Download Helper lets you download data to your desktop. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('download'); + +The following functions are available: + +force_download('filename', 'data') +================================== + +Generates server headers which force data to be downloaded to your +desktop. Useful with file downloads. The first parameter is the **name +you want the downloaded file to be named**, the second parameter is the +file data. Example + +:: + + $data = 'Here is some text!'; + $name = 'mytext.txt'; + force_download($name, $data); + +If you want to download an existing file from your server you'll need to +read the file into a string + +:: + + $data = file_get_contents("/path/to/photo.jpg"); // Read the file's contents + $name = 'myphoto.jpg'; + force_download($name, $data); + diff --git a/user_guide_src/source/helpers/email_helper.rst b/user_guide_src/source/helpers/email_helper.rst new file mode 100644 index 000000000..d4e94b1ed --- /dev/null +++ b/user_guide_src/source/helpers/email_helper.rst @@ -0,0 +1,49 @@ +############ +Email Helper +############ + +The Email Helper provides some assistive functions for working with +Email. For a more robust email solution, see CodeIgniter's :doc:`Email +Class <../libraries/email>`. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code:: + + $this->load->helper('email'); + + +The following functions are available: + +valid_email('email') +==================== + +Checks if an email is a correctly formatted email. Note that is doesn't +actually prove the email will recieve mail, simply that it is a validly +formed address. + +It returns TRUE/FALSE + +:: + + $this->load->helper('email'); + + if (valid_email('email@somesite.com')) + { + echo 'email is valid'; + } + else + { + echo 'email is not valid'; + } + +send_email('recipient', 'subject', 'message') +============================================= + +Sends an email using PHP's native +`mail() `_ function. For a more robust +email solution, see CodeIgniter's :doc:`Email +Class <../libraries/email>`. diff --git a/user_guide_src/source/helpers/file_helper.rst b/user_guide_src/source/helpers/file_helper.rst new file mode 100644 index 000000000..bfc271eb3 --- /dev/null +++ b/user_guide_src/source/helpers/file_helper.rst @@ -0,0 +1,135 @@ +########### +File Helper +########### + +The File Helper file contains functions that assist in working with files. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('file'); + +The following functions are available: + +read_file('path') +================= + +Returns the data contained in the file specified in the path. Example + +:: + + $string = read_file('./path/to/file.php'); + +The path can be a relative or full server path. Returns FALSE (boolean) on failure. + +.. note:: The path is relative to your main site index.php file, NOT your + controller or view files. CodeIgniter uses a front controller so paths + are always relative to the main site index. + +If your server is running an `open_basedir` restriction this function might not work if you are trying to access a file above the calling script. + +write_file('path', $data) +========================= + +Writes data to the file specified in the path. If the file does not exist the function will create it. Example + +:: + + $data = 'Some file data'; + if ( ! write_file('./path/to/file.php', $data)) + {      + echo 'Unable to write the file'; + } + else + {      + echo 'File written!'; + } + +You can optionally set the write mode via the third parameter + +:: + + write_file('./path/to/file.php', $data, 'r+'); + +The default mode is wb. Please see the `PHP user guide `_ for mode options. + +Note: In order for this function to write data to a file its file permissions must be set such that it is writable (666, 777, etc.). If the file does not already exist, the directory containing it must be writable. + +.. note:: The path is relative to your main site index.php file, NOT your + controller or view files. CodeIgniter uses a front controller so paths + are always relative to the main site index. + +delete_files('path') +==================== + +Deletes ALL files contained in the supplied path. Example + +:: + + delete_files('./path/to/directory/'); + +If the second parameter is set to true, any directories contained within the supplied root path will be deleted as well. Example + +:: + + delete_files('./path/to/directory/', TRUE); + +.. note:: The files must be writable or owned by the system in order to be deleted. + +get_filenames('path/to/directory/') +=================================== + +Takes a server path as input and returns an array containing the names of all files contained within it. The file path can optionally be added to the file names by setting the second parameter to TRUE. + +get_dir_file_info('path/to/directory/', $top_level_only = TRUE) +=============================================================== + +Reads the specified directory and builds an array containing the filenames, filesize, dates, and permissions. Sub-folders contained within the specified path are only read if forced by sending the second parameter, $top_level_only to FALSE, as this can be an intensive operation. + +get_file_info('path/to/file', $file_information) +================================================ + +Given a file and path, returns the name, path, size, date modified. Second parameter allows you to explicitly declare what information you want returned; options are: `name`, `server_path`, `size`, `date`, `readable`, `writable`, `executable`, `fileperms`. Returns FALSE if the file cannot be found. + +.. note:: The "writable" uses the PHP function is_writable() which is known + to have issues on the IIS webserver. Consider using fileperms instead, + which returns information from PHP's fileperms() function. + +get_mime_by_extension('file') +============================= + +Translates a file extension into a mime type based on config/mimes.php. Returns FALSE if it can't determine the type, or open the mime config file. + +:: + + $file = "somefile.png"; + echo $file . ' is has a mime type of ' . get_mime_by_extension($file); + + +.. note:: This is not an accurate way of determining file mime types, and + is here strictly as a convenience. It should not be used for security. + +symbolic_permissions($perms) +============================ + +Takes numeric permissions (such as is returned by `fileperms()` and returns standard symbolic notation of file permissions. + +:: + + echo symbolic_permissions(fileperms('./index.php')); // -rw-r--r-- + +octal_permissions($perms) +========================= + +Takes numeric permissions (such as is returned by fileperms() and returns a three character octal notation of file permissions. + +:: + + echo octal_permissions(fileperms('./index.php')); // 644 + diff --git a/user_guide_src/source/helpers/form_helper.rst b/user_guide_src/source/helpers/form_helper.rst new file mode 100644 index 000000000..3794e0835 --- /dev/null +++ b/user_guide_src/source/helpers/form_helper.rst @@ -0,0 +1,506 @@ +########### +Form Helper +########### + +The Form Helper file contains functions that assist in working with +forms. + +.. contents:: Page Contents + +Loading this Helper +=================== + +This helper is loaded using the following code + +:: + + $this->load->helper('form'); + +The following functions are available: + +form_open() +=========== + +Creates an opening form tag with a base URL **built from your config preferences**. It will optionally let you add form attributes and hidden input fields, and will always add the attribute accept-charset based on the charset value in your config file. + +The main benefit of using this tag rather than hard coding your own HTML is that it permits your site to be more portable in the event your URLs ever change. + +Here's a simple example + +:: + + echo form_open('email/send'); + +The above example would create a form that points to your base URL plus the "email/send" URI segments, like this + +:: + +
+ +Adding Attributes +^^^^^^^^^^^^^^^^^ + +Attributes can be added by passing an associative array to the second +parameter, like this + +:: + + $attributes = array('class' => 'email', 'id' => 'myform'); + echo form_open('email/send', $attributes); + +The above example would create a form similar to this + +:: + + + +Adding Hidden Input Fields +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Hidden fields can be added by passing an associative array to the third parameter, like this + +:: + + $hidden = array('username' => 'Joe', 'member_id' => '234'); + echo form_open('email/send', '', $hidden); + +The above example would create a form similar to this + +:: + + + + + +form_open_multipart() +===================== + +This function is absolutely identical to the `form_open()` tag above +except that it adds a multipart attribute, which is necessary if you +would like to use the form to upload files with. + +form_hidden() +============= + +Lets you generate hidden input fields. You can either submit a +name/value string to create one field + +:: + + form_hidden('username', 'johndoe'); + // Would produce: + +Or you can submit an associative array to create multiple fields + +:: + + $data = array(                + 'name'  => 'John Doe',                + 'email' => 'john@example.com',                + 'url'   => 'http://example.com'              + ); + + echo form_hidden($data); + + /* + Would produce: + + + + */ + +form_input() +============ + +Lets you generate a standard text input field. You can minimally pass +the field name and value in the first and second parameter + +:: + + echo form_input('username', 'johndoe'); + +Or you can pass an associative array containing any data you wish your +form to contain + +:: + + $data = array(                + 'name'        => 'username',                + 'id'          => 'username',                + 'value'       => 'johndoe',                + 'maxlength'   => '100',                + 'size'        => '50',                + 'style'       => 'width:50%',              + ); + + echo form_input($data); + + /* + Would produce: + + + */ + +If you would like your form to contain some additional data, like +Javascript, you can pass it as a string in the third parameter + +:: + + $js = 'onClick="some_function()"'; + echo form_input('username', 'johndoe', $js); + +form_password() +=============== + +This function is identical in all respects to the `form_input()` function above except that it uses the "password" input type. + +form_upload() +============= + +This function is identical in all respects to the `form_input()` function above except that it uses the "file" input type, allowing it to be used to upload files. + +form_textarea() +=============== + +This function is identical in all respects to the `form_input()` function above except that it generates a "textarea" type. Note: Instead of the "maxlength" and "size" attributes in the above example, you will instead specify "rows" and "cols". + +form_dropdown() +=============== + +Lets you create a standard drop-down field. The first parameter will +contain the name of the field, the second parameter will contain an +associative array of options, and the third parameter will contain the +value you wish to be selected. You can also pass an array of multiple +items through the third parameter, and CodeIgniter will create a +multiple select for you. Example + +:: + + $options = array(                    + 'small'  => 'Small Shirt',                    + 'med'    => 'Medium Shirt',                    + 'large'   => 'Large Shirt',                    + 'xlarge' => 'Extra Large Shirt',                  + ); + + $shirts_on_sale = array('small', 'large'); + echo form_dropdown('shirts', $options, 'large'); + + /* + Would produce: + + + */ + + echo form_dropdown('shirts', $options, $shirts_on_sale); + + /* + Would produce: + + + */ + +If you would like the opening + +The third parameter contains a boolean TRUE/FALSE to determine whether +the box should be checked or not. + +Similar to the other form functions in this helper, you can also pass an +array of attributes to the function + +:: + + $data = array(      + 'name'        => 'newsletter',      + 'id'          => 'newsletter',      + 'value'       => 'accept',      + 'checked'     => TRUE,      + 'style'       => 'margin:10px',      + ); + + echo form_checkbox($data); + // Would produce: + +As with other functions, if you would like the tag to contain additional +data, like JavaScript, you can pass it as a string in the fourth +parameter + +:: + + $js = 'onClick="some_function()"'; + echo form_checkbox('newsletter', 'accept', TRUE, $js) + +form_radio() +============ + +This function is identical in all respects to the `form_checkbox()` +function above except that it uses the "radio" input type. + +form_submit() +============= + +Lets you generate a standard submit button. Simple example + +:: + + echo form_submit('mysubmit', 'Submit Post!'); + // Would produce: + +Similar to other functions, you can submit an associative array in the +first parameter if you prefer to set your own attributes. The third +parameter lets you add extra data to your form, like JavaScript. + +form_label() +============ + +Lets you generate a