PHP 5, PHP 7, PHP 8
array_diff_uassoc - Computes the difference of arrays with additional index check which is performed by a user supplied callback function
Code Examples

array_diff_uassoc( array$array, ... array$arrays, callable$key_compare_func ): array

Compares array against arrays and returns the difference. Unlike array_diff the array keys are used in the comparison.

Unlike array_diff_assoc a user supplied callback function is used for the indices comparison, not internal function.



The array to compare from


Arrays to compare against


The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

callback(mixed$a,mixed$b ): int

Return Values

Returns an array containing all the entries from array that are not present in any of the other arrays.



This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, array_diff_uassoc($array1[0], $array2[0], "key_compare_func");.

Related Functions

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