PHP_Dyn is PHP Extension to help debugging a PHP script.
You can get execution trace of scripts not to need change them.
HTTP request parameter can be printed.
Argument value of the function call and return value can be printed.
Denwer is a collection of often-used web-servers for web-programmers. It is used to debug web-sites under Win32. Denwer includes: friendly installer; Apache; PHP; MySQL; Perl; virtual host management system; phpMyAdmin; sendmail stub; start/stop manager.