title: I need to debug PHP. What is my best choice?
body: <p>I'm working on a web site under a Linux environment (Debian). I'm not an expert at Linux but I can handle it, and the website is made using PHP, MySQL, HTML, etc.</p>
  
  <p>The thing is, I'm using PHP for the server side. Right now, for testing, I installed Apache on my PC so I can test everything. But, it would be great if I could debug the PHP code. So far, I didn't need it, but now the code is getting larger, it's a must.</p>
  
  <p>So far, I'm using vim and everything is fine, but, how can I debug PHP in my case? What tools should I install? Are they free?</p>
  
  <p>Basically, I need to know what would be the best choice in my situation.</p>