title: multiply 2 arrays with eachother in PHP
body: <p>I currently have the 2 arrays below:</p>
  
  <p>Array 1:</p>
  
  <pre><code>$rekeningnummer = $_POST['input']; // example "9876543219"
  $rekeningnum_array = str_split($rekeningnummer);
  </code></pre>
  
  <p>Array 2:</p>
  
  <pre><code>$gewichten = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
  </code></pre>
  
  <p>How do I multiply a $rekeningnum_array object with the array object of $gewichten?</p>
  
  <p>So as a example: 9+1, 8+2, 7+3 etc.</p>