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PHP array_intersect() Function

PHP Array Reference PHP Array Reference

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);
?>

Run example »

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 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 1

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);
?>

Run example »


PHP Array Reference PHP Array Reference

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