Write a PHP program that multiplies corresponding elements of two given lists

Introduction

PHP is a server scripting language, and It is a powerful tool for making interactive and dynamic Web-pages. I have used WampServer 2.2 for following excercise..

<?php
function multiply_two_lists($x, $y)
  {
    $a = explode(' ',trim($x));
    $b = explode(' ',trim($y));
    foreach($a as $key=>$value){
        $output[$key] = $a[$key]*$b[$key];
    }
    return implode(' ',$output);
}
echo multiply_two_lists(("20 12 5"), ("1 3 3"))."\n";
?>

Result

Write a PHP program that multiplies corresponding elements of two given lists

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