title: Adding a string and an integer in php
body: <p>I'm trying to add a 1 in front of my binary code and this is how I'm going about it:
  if I have <code>0101</code>, for example, then I'd add a number with 4 zeroes, like 10000 so it would become 10101. Here's my code:</p>
  
  <pre><code>$fill = strlen($string);
  $number = '1';
  $add = str_pad($number, $fill, '0', STR_PAD_RIGHT);
  $m1 = $string + $add;
  </code></pre>
  
  <p>The problem is the output for that is something like <code>1.random number e+Random number</code></p>