PHP array_intersect() Function

Example

Compare the values of two arrays, and return the matches:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");

$result=array_intersect($a1,$a2);
print_r($result);
?>

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Definition and Usage

The array_intersect() function compares the values of two (or more) arrays, and returns the matches.

This function compares the values of two or more arrays, and return an array that contains the entries from array1 that are present in array2, array3, etc.

Syntax

array_intersect( array1, array2, array3, ...)

Parameter Values

Parameter	Description
array1	Required. The array to compare from
array2	Required. An array to compare against
array3,...	Optional. More arrays to compare against

Technical Details

Return Value:	Returns an array containing the entries from array1 that are present in all of the other arrays
PHP Version:	4.0.1+

More Examples

Example

Compare the values of three arrays, and return the matches:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"black","g"=>"purple");
$a3=array("a"=>"red","b"=>"black","h"=>"yellow");

$result=array_intersect($a1,$a2,$a3);
print_r($result);
?>

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❮ PHP Array Reference