(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)
array_intersect — Computes the intersection of arrays
$array, array ...$arrays): array
array_intersect() returns an array
containing all the values of array
that are present in all the arguments.
Note that keys are preserved.
arrayThe array with master values to check.
arraysArrays to compare values against.
Returns an array containing all of the values in
array whose values exist in all of the parameters.
| Version | Description |
|---|---|
| 8.0.0 | This function can now be called with only one parameter. Formerly, at least two parameters have been required. |
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
)
Note: Two elements are considered equal if and only if
(string) $elem1 === (string) $elem2. In words: when the string representation is the same.