title: Call a function without knowing it's name
body: <p>I want to create a function in PHP and to call it without knowing the function's name.</p>
  
  <p>Is this possible?</p>
  
  <p>Example:</p>
  
  <pre><code>&lt;?php
  
       $functionName = "someName";
       $this-&gt;$functionName();
       function someName(){
           echo("Print Message");
       }
  ?&gt;
  </code></pre>