PHP 8 reference · Array Functions

PHP array_intersect() Function

Return the values of the first array that are also present in all the other arrays. Keys come from the first array.

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Syntax

array_intersect(array $array, array ...$arrays): array

Parameter	Description
`array`	The input array.
`arrays`	Arrays to compare against.

The common values.

Common valuesTry it yourself

<?php
print_r(array_intersect(["php", "sql", "css"], ["sql", "php", "go"]));

Output

Array
(
    [0] => php
    [1] => sql
)

Shared itemsTry it yourself

<?php
$ada = ["php", "python", "sql"];
$alan = ["sql", "go", "php"];
echo "shared skills: ", implode(", ", array_intersect($ada, $alan)), "\n";

Output

shared skills: php, sql

Version	Change
PHP 4.0	Added

array_intersect_key() · Return the entries of the first array whose keys exist in all the other arrays. Great for whitelisting fields.
array_diff() · Return the values of the first array that are not in any of the others. Values are compared as strings.
PHP Array Functions · tutorial
PHP Arrays · tutorial