In this tutorial, you shall learn about PHP array_diff_assoc() function which can compute the difference of an array against other arrays, with syntax and examples.
PHP array_diff_assoc() Function
PHP array_diff_assoc() function computes the difference of an array against other arrays. Both key/index and value are considered for comparison.
In this tutorial, we will learn the syntax of array_diff_assoc(), and how to use this function to find the difference of an array from other arrays, covering different scenarios based on array type and arguments.
Syntax of array_diff_assoc()
The syntax of PHP array_diff_assoc() function is
array_diff_assoc ( array $array1 , array $array2 [, array $... ] ) : arraywhere
| Parameter | Description |
|---|---|
| array1 | [mandatory] Array of interest. Compare the items of this array against other arrays’. |
| array2 | [mandatory] Array of reference. The items of this array are used to comparison against. |
Along with array2, you can provide as many number of arrays to compare against. But these additional arrays are optional.
Return Value
The array_diff_assoc() function returns an array whose key-value pairs are present in $array1 but not present in $array2 or other arrays(if provided).
Examples
1. Compute difference of Arrays: array1 – array2
In this example, we will take an associative array, array1, with key-value pairs, and compare it against another array, array2.
PHP Program
<?php
$array1 = array('a'=>'apple', 'b'=>'banana', 'c'=>'cherry');
$array2 = array('a'=>'apricot', 'b1'=>'banana', 'c'=>'cherry');
$result = array_diff_assoc($array1, $array2);
print_r($result);
?>Output