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Diffstat (limited to 'user_guide_src/source/helpers/array_helper.rst')
| -rw-r--r-- | user_guide_src/source/helpers/array_helper.rst | 92 |
1 files changed, 40 insertions, 52 deletions
diff --git a/user_guide_src/source/helpers/array_helper.rst b/user_guide_src/source/helpers/array_helper.rst index 4308753bb..9435b3ac7 100644 --- a/user_guide_src/source/helpers/array_helper.rst +++ b/user_guide_src/source/helpers/array_helper.rst @@ -10,9 +10,7 @@ arrays. Loading this Helper =================== -This helper is loaded using the following code - -:: +This helper is loaded using the following code:: $this->load->helper('array'); @@ -21,20 +19,19 @@ The following functions are available: element() ========= -.. php:method:: element($item, $array, $default = FALSE) - - :param string $item: Item to fetch from the array - :param array $array: Input array - :param boolean $default: What to return if the array isn't valid - :returns: FALSE on failure or the array item. +.. php:function:: element($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 FALSE, or whatever you've -specified as the default value via the third parameter. Example +returned. If a value does not exist it returns NULL, or whatever you've +specified as the default value via the third parameter. -:: +Example:: $array = array( 'color' => 'red', @@ -43,65 +40,58 @@ specified as the default value via the third parameter. Example ); echo element('color', $array); // returns "red" - echo element('size', $array, NULL); // returns NULL + echo element('size', $array, 'foobar'); // returns "foobar" elements() ========== +.. php:function:: elements($items, $array, $default = NULL) + + :param string $item: Item to fetch from the array + :param array $array: Input array + :param bool $default: What to return if the array isn't valid + :returns: NULL on failure or the array item. + Lets you fetch a number of items from an array. The function tests whether each of the array indices is set. If an index does not exist it -is set to FALSE, or whatever you've specified as the default value via +is set to NULL, or whatever you've specified as the default value via the third parameter. -.. php:method:: elements($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 - -:: +Example:: $array = array( - 'color' => 'red', - 'shape' => 'round', - 'radius' => '10', + 'color' => 'red', + 'shape' => 'round', + 'radius' => '10', 'diameter' => '20' ); $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' => FALSE + '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, NULL); + $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' => NULL + 'color' => 'red', + 'shape' => 'round', + 'height' => 'foobar' ); -This is useful when sending the $_POST array to one of your Models. +This is useful when sending the ``$_POST`` array to one of your Models. This prevents users from sending additional POST data to be entered into -your tables +your tables. :: @@ -116,15 +106,14 @@ updated. random_element() ================ -Takes an array as input and returns a random element from it. Usage -example +.. php:function:: random_element($array) -.. php:method:: random_element($array) + :param array $array: Input array + :returns: string (a random element from the array) - :param array $array: Input array - :returns: String - Random element from the array. +Takes an array as input and returns a random element from it. -:: +Usage example:: $quotes = array( "I find that the harder I work, the more luck I seem to have. - Thomas Jefferson", @@ -135,5 +124,4 @@ example "Chance favors the prepared mind - Louis Pasteur" ); - echo random_element($quotes); - + echo random_element($quotes);
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