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Diffstat (limited to 'user_guide_src/source')
| -rw-r--r-- | user_guide_src/source/helpers/array_helper.rst | 141 |
1 files changed, 72 insertions, 69 deletions
diff --git a/user_guide_src/source/helpers/array_helper.rst b/user_guide_src/source/helpers/array_helper.rst index 90ead2942..20f5864a6 100644 --- a/user_guide_src/source/helpers/array_helper.rst +++ b/user_guide_src/source/helpers/array_helper.rst @@ -5,7 +5,12 @@ Array Helper The Array Helper file contains functions that assist in working with arrays. -.. contents:: Page Contents +.. contents:: + :local: + +.. raw:: html + + <div class="custom-index container"></div> Loading this Helper =================== @@ -14,114 +19,112 @@ This helper is loaded using the following code:: $this->load->helper('array'); + +Available Functions +=================== + The following functions are available: -element() -========= -.. function:: element($item, $array, $default = NULL) +.. function:: element($item, $array[, $default = NULL]) :param string $item: Item to fetch from the array :param array $array: Input array :param bool $default: What to return if the array isn't valid :returns: NULL 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 NULL, or whatever you've -specified as the default value via the third parameter. + 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 NULL, or whatever you've + specified as the default value via the third parameter. -Example:: + Example:: - $array = array( - 'color' => 'red', - 'shape' => 'round', - 'size' => '' - ); + $array = array( + 'color' => 'red', + 'shape' => 'round', + 'size' => '' + ); - echo element('color', $array); // returns "red" - echo element('size', $array, 'foobar'); // returns "foobar" + echo element('color', $array); // returns "red" + echo element('size', $array, 'foobar'); // returns "foobar" -elements() -========== -.. function:: elements($items, $array, $default = NULL) +.. function:: elements($items, $array[, $default = NULL]) :param string $item: Item to fetch from the array :param array $array: Input array :param bool $default: What to return if the array isn't valid :returns: NULL on failure or the array item. -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 NULL, or whatever you've specified as the default value via -the third parameter. + 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 NULL, or whatever you've specified as the default value via + the third parameter. -Example:: + Example:: - $array = array( - 'color' => 'red', - 'shape' => 'round', - 'radius' => '10', - 'diameter' => '20' - ); + $array = array( + 'color' => 'red', + 'shape' => 'round', + 'radius' => '10', + 'diameter' => '20' + ); - $my_shape = elements(array('color', 'shape', 'height'), $array); + $my_shape = elements(array('color', 'shape', 'height'), $array); -The above will return the following array:: + The above will return the following array:: - array( - 'color' => 'red', - 'shape' => 'round', - 'height' => NULL - ); + array( + 'color' => 'red', + 'shape' => 'round', + 'height' => NULL + ); -You can set the third parameter to any default value you like. -:: + You can set the third parameter to any default value you like. + :: - $my_shape = elements(array('color', 'shape', 'height'), $array, 'foobar'); + $my_shape = elements(array('color', 'shape', 'height'), $array, 'foobar'); -The above will return the following array:: + The above will return the following array:: - array( - 'color' => 'red', - 'shape' => 'round', - 'height' => 'foobar' - ); + array( + 'color' => 'red', + 'shape' => 'round', + 'height' => 'foobar' + ); -This is useful when sending the ``$_POST`` array to one of your Models. -This prevents users from sending additional POST data to be entered into -your tables. + This 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->load->model('post_model'); + $this->post_model->update( + elements(array('id', 'title', 'content'), $_POST) + ); -This ensures that only the id, title and content fields are sent to be -updated. + This ensures that only the id, title and content fields are sent to be + updated. -random_element() -================ .. function:: random_element($array) :param array $array: Input array :returns: string (a random element from the array) -Takes an array as input and returns a random element from it. + Takes an array as input and returns a random element from it. -Usage example:: + Usage example:: - $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" - ); + $quotes = array( + "I find that the harder I work, the more luck I seem to have. - Thomas Jefferson", + "Don't stay in bed, unless you can make money in bed. - George Burns", + "We didn't lose the game; we just ran out of time. - Vince Lombardi", + "If everything seems under control, you're not going fast enough. - Mario Andretti", + "Reality is merely an illusion, albeit a very persistent one. - Albert Einstein", + "Chance favors the prepared mind - Louis Pasteur" + ); - echo random_element($quotes);
\ No newline at end of file + echo random_element($quotes);
\ No newline at end of file |