array_intersect
array_intersect
(PHP 4 >= 4.0.1, PHP 5, PHP 7)
array_intersect — Computes the intersection of arrays
Description
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.
Return Values
Returns an array containing all of the values in array1
whose values exist in all of the parameters.
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
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.array-intersect.php