# PHP array_diff_assoc() Function

PHP Array Reference

## Example

Compare the keys and values of two arrays, and return the differences:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("a"=>"red","b"=>"green","c"=>"blue");
$result=array_diff_assoc($a1,$a2);
print_r($result);
?>
Run example »

## Definition and Usage

The array_diff_assoc() function compares the keys and values of two (or more) arrays, and returns the differences.

This function compares the keys and values of two (or more) arrays, and return an array that contains the entries from array1 that are not present in array2 or array3, etc.

## Syntax

array_diff_assoc(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 not present in any of the other arrays
PHP Version: | 4.3+

## More Examples

## Example 1

Compare the keys and values of two arrays, and return the differences:

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

## Example 2

Compare the keys and values of three arrays, and return the differences:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("a"=>"red","f"=>"green","g"=>"blue");
$a3=array("h"=>"red","b"=>"green","g"=>"blue");
$result=array_diff_assoc($a1,$a2,$a3);
print_r($result);
?>
Run example »

PHP Array Reference

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