The array_diff_uassoc() compares array keys and values, with an additional user-made function check, and returns the differences. It returns an array containing the entries from the first array that are not present in any of the other arrays.
Syntax
array_diff_uassoc(arr1, arr2, arr3, arr4, …, compare_func)
Parameters
arr1 − Array to compare from. Required.
arr2 − Array to compare against. Required.
arr3 − You can add more arrays to compare. Optional.
arr4 − You can add more arrays to compare. Optional.
compare_func − This callback function must return an integer <, =, or > than 0 if the first argument is considered to be respectively <, =, or > than the second.
Return
The array_diff_uassoc() function returns an array containing the entries from the first array that are not present in any of the other arrays.
Example
<?php
function compare_func($a, $b) {
if ($a === $b) {
return 0;
}
return ($a > $b)? 1:-1;
}
$arr1 = array("a" => "laptop", "b" => "keyboard", "c" => "mouse", "monitor");
$arr2 = array("a" => "laptop", "harddisk", "RAM", "monitor");
$res = array_diff_uassoc($arr1, $arr2, "compare_func");
print_r($res);
?>Output
Array ( [b] => keyboard [c] => mouse [0] => monitor )