PHP - array_intersect

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Metóda - array_intersect

(PHP 4 >= 4.0.1, PHP 5, PHP 7)

The function returns an array which is an intersection of the values of entered arrays.

In the first array, only the keys whose values are also present in the second array are kept. The second array can be understood as a model. Keys from the second array will never be in the result.

Procedurálne

• function array_intersect (array $array1, array $array2, array $...) : array

Parametre

Názov	Dátový typ	Predvolená hodnota	Popis
$array1	array		The array with values to intersect.
$array2	array		An array with values to intersect.
$...	array		Other arrays with values to intersect.

Mávratovej hodnoty

Vracia: array

An array with an intersection of values of both arrays.

Príklady

<?php
$array = ['yellow', 'black', 'purple', 'red'];
$allowed = ['yellow', 'red', 'green'];

$array = array_intersect($array, $allowed);
print_r($array);

We can see the keys (here indexes) are not changed. The example would work the same way for an associative array.