title: How big is a string in PHP?
body: <p>If I download a file from a website using: </p>
  
  <pre><code>$html = file_get_html($url); 
  </code></pre>
  
  <p>Then how can I know the size, in kilobyes, of the HTML string? I want to know, because I want to skip files over 100Kb.</p>