array_intersect
(PHP 4 >= 4.0.1, PHP 5)
array_intersect -- Computes the intersection of arrays
Description
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
<?php
$array1 = array("a" => "green", "red", "blue");
$array2 = array("b" => "green", "yellow", "red");
$result = array_intersect($array1, $array2);
?>
|
This makes $result have
Array
(
[a] => green
[0] => red
)
|
|
Note:
Two elements are considered equal if and only if
(string) $elem1 === (string) $elem2. In words:
when the string representation is the same.
See also array_intersect_assoc(),
array_diff(), and
array_diff_assoc().