(PHP 4 >= 4.0.1, PHP 5, PHP 7)
Computes the intersection of arrays
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.
...
A variable list of arrays to compare.
Returns:
Returns an array containing all of the values in array1
whose values exist in all of the parameters.
Notes:
Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.
Examples:
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 )
See also:
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