title: symbols == 0 true in php
body: <p>I have script like this </p>
  
  <pre><code>if('@' == 0){
          echo "true";
      }else{
          echo "false";
      }
  </code></pre>
  
  <p>output : </p>
  
  <pre><code>true
  </code></pre>
  
  <p>the question is why it get true and how to get it false?
  thanks.</p>