title: Default php function that turns negative numbers in 0
body: <p>Is there such a thing?</p>
  
  <p>for eg</p>
  
  <pre><code>$var = -5;
  echo thefunction($var); // should be 0
  
  
  $var = 5;
  echo thefunction($var); // should be 5
  </code></pre>