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PHP Functions
Function: array_diff (PHP 4 >= 4.0.1, PHP 5) array_diff -- Computes the difference of arraysDescriptionarray array_diff ( array array1, array array2 [, array ...] )array_diff() returns an array containing all the values of array1 that are not present in any of the other arguments. Note that keys are preserved.
Example 1. array_diff() example <?php $array1 = array("a" => "green", "red", "blue", "red"); $array2 = array("b" => "green", "yellow", "red"); $result = array_diff($array1, $array2); print_r($result); ?> Multiple occurrences in $array1 are all treated the same way. This will output : Array ( [1] => blue ) Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 . In words: when the string representation is the same. Note: Please note that this function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff($array1[0], $array2[0]); . Warning This was broken in PHP 4.0.4! Related Function(s) |