PHP array_diff_uassoc() Function

This function is inbuilt in PHP and it was introduced in PHP 5. The function array_diff_uassoc() is used to compute the difference of arrays with additional index check which is performed by a user supplied callback function.

In simple words, the function compares array1 against array2 and returns the difference.

Syntax

Important note: This function uses a user-defined function to compare the keys.

Return Type

This function returns an array containing the entries from array1 that are not present in any of the other ways.

Example 1

Output:

 Array( [10] => sid [20] => raj ) 

Example 2

Output:

 Array ( [b] => brown [c] => blue [0] => red ) 

Example 3

Output:

 Array ( [c] => orange ) 

Example 4

Output:

 Array ( [b] => brown [c] => blue [0] => red )