array array_intersect
(array array1, array array2 [, array
...])
array_intersect() returns an array containing all the values of array1 that are present in all the arguments. Note that keys are preserved.
Example 1. array_intersect() example
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This makes $result have array ("a" => "green", "red");
Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.
Warning |
This was broken in PHP 4.0.4! |
See also array_diff().