PHP: array_diff_assoc() function

Last update on August 19 2022 21:51:15 (UTC/GMT +8 hours)

PHP: Computes the difference of arrays with additional index check

The array_diff_assoc() function is used to compare an array against another array and returns the difference. Unlike array_diff() the array keys are also used in the comparison.

Version:

(PHP 4 and above)

Syntax:

array_diff_assoc(ref_array, array1, array2,.....)

Parameter:

Name	Description	Required / Optional	Type
ref_array	The first array which will be compared with other arrays.	Required	Array
array1	Compared with the first array.	Required	Array
array2	Compared with the first array.	Optional	Array

Return value

A new array containing the keys and values of ref_array that are not present in any of the other arrays i.e. array1, array2 etc.

Value Type: Array

Example:

<?php
$array1 = array('Math'=>77, 20, 'Geography'=>89,30,'Language'=>67);
$array2 = array('Math'=>77, 'science'=>91 ,20, 'History'=>71);
$diff_result = array_diff_assoc($array1, $array2);
print_r($diff_result);
?>

Output :

Array ( [Geography] => 89 [1] => 30 [Language] => 67)

Pictorial Presentation:

php function reference: array_diff_assoc() function

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