array_intersect (PHP 4 ) array_intersect -- Computes the intersection of arrays Descriptionarray 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 $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
) |
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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!
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See also array_diff().
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