array_intersect
(PHP 4 >= 4.0.1)
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().
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