 <p>A simple code:</p> <pre><code>$source = "JTNDJTNGcGhwJTIwVGhpcyUyMGlzJTIwdGhlJTIwUEhQJTIwY29kZSUyMCUzRiUzRQ=="; $code = base64_decode($source); eval($code); </code></pre> <p>or even shorter:</p> <pre><code>eval(base64_decode("JTNDJTNGcGhwJTIwVGhpcyUyMGlzJTIwdGhlJTIwUEhQJTIwY29kZSUyMCUzRiUzRQ==")); </code></pre> <p>Do you want to encrypt your code? If so, this is not the right way. Use a accelerator like <a href="http://eaccelerator.net/" rel="nofollow">this one</a> or <a href="http://www.php-accelerator.co.uk/" rel="nofollow">this one</a>. They will crypt your codes and make them even faster!</p>