array_intersect
(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)
array_intersect — Computes the intersection of arrays
Description
array_intersect(array
$array, array ...$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.
Parameters
-
array -
The array with master values to check.
-
arrays -
Arrays to compare values against.
Return Values
Returns an array containing all of the values in
array whose values exist in all of the parameters.
Changelog
| Version | Description |
|---|---|
| 8.0.0 | This function can now be called with only one parameter. Formerly, at least two parameters have been required. |
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
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