Question

$a1 = array('A', 'A', 'A', 'A', 'B', 'C');
$a2 = array('A', 'A', 'A', 'A', 'B', 'C');

I want to match the first 'A' in $a1 with the last 'A' in $a2. And the second 'A' in $a1 with the second-from-last 'A' in $a2.

$a1 with $a2, like so:

0 => 'A' with 3 => 'A' 
1 => 'A' with 2 => 'A'
2 => 'A' with 1 => 'A'
3 => 'A' with 0 => 'A' 

I need an if statement to determine if there is another instance of 'A' in $a1 to match it with its respective value in $a2

Answer 1

function myMatch($vala, $valb) {
/*this can make your custom matching equality, length in case of strings, types what ever
returns true if values $vala and $valb match and false if they do not
*/
}

$matches = array();

foreach($a1 as $key=>$value) {

   if(isset($a2[$key])) {

   $matches[$key] = myMatch($a1[$key],$a2[$key]) ? 
"matches for ".$key." with value ".$value : "no match for ".$key." with ".$value;

   } else {

      $matches[$key] = "Missing pair in a2 for key ".$key;

   }

}


print_R($matches);