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.
Parameters
- array1
-
The array with master values to check.
- array2
-
An array to compare values against.
- array
-
A variable list of arrays to compare.
Return Values
Returns an array containing all of the values in array1 whose values exist in all of the parameters.
Examples
Example #1 array_intersect() example
<?php
$array1 = array("a" => "green", "red", "blue");
$array2 = array("b" => "green", "yellow", "red");
$result = array_intersect($array1, $array2);
print_r($result);
?>
The above example will output:
Array
(
[a] => green
[0] => red
)
Notes
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() - Computes the intersection of arrays with additional index check
- array_diff() - Computes the difference of arrays
- array_diff_assoc() - Computes the difference of arrays with additional index check