Compare the keys of three arrays with user-defined function to compare keys, return differences in PHP
Description
The following code shows how to compare the keys of three arrays with user-defined function to compare keys, return differences.
Example
/* w ww. j a v a 2 s. c om*/
<?php
function myfunction($a,$b){
if ($a===$b){
return 0;
}
return ($a>$b)?1:-1;
}
$a1=array("a"=>"red","b"=>"green","c"=>"blue");
$a2=array("a"=>"black","b"=>"Basic","d"=>"Dart");
$a3=array("e"=>"purple","f"=>"white","a"=>"gold");
$result=array_diff_ukey($a1,$a2,$a3,"myfunction");
print_r($result);
?>
The code above generates the following result.
