KDevelop can debug PHP programs, both cli scripts and web applications.
Xdebug - Debugger and Profiler Tool for PHP
KDevelop uses Xdebug through the kdev-xdebug plugin. Setting up Xdebug is tricky, so we recommend you to use the XDebug installation wizard. The main step once xdebug is installed is to configure PHP to use Xdebug by adding
to your php.ini. The path of your php.ini is shown in your phpinfo() output under "Loaded Configuration File".
Enable remote debugging in your php.ini:
[XDebug] xdebug.remote_enable = 1 xdebug.remote_autostart = 1
If you are doing web development, don't forget to restart your webserver to reload the settings
Verify your installation by checking your phpinfo() output for an Xdebug section.
You need to install these two plugins: