In my case, for example, I had both Xdebug and Zend Debugger running simultaneously.

The following error: 'Cannot accept external Xdebug connection: Cannot evaluate expression 'isset($_SERVER)'', may be caused by a variety of reasons.

This approach allows diagnosing the problems, if any, discarding the IDE factor from the outset.

You can use a command line client to check if your SSH tunnel is working and Xdebug is sending the debugging info.

Besides Xdebug, PhpStorm supports Zend Debugger.

Do refer to this section if something goes wrong or is unclear.

PhpStorm documentation contains a large section, dedicated to setting up the debugging features.

You are done setting up PhpStorm relying on Xdebug. Else, the debugger will suggest collating files manually, presenting a list of possible options. If PhpStorm automatically matched locally stored files and those on the server, it will open the debugging window right away. Set the halt point, activate the debugger (using the extension or manually) and open the debugging page in your browser. Click it again to make things as they were. You can also switch listening on in the main menu, Run | Start Listening for PHP Debug Connections. Hit Start Listening for PHP Debug Connections on the panel to have PhpStorm process incoming Xdebug connections. But, truth be told, it is often more convenient to work with the entire code within reach. There is no need to download the entire code of the project to your computer, you can get only the files you need to debug.

Open terminal on your computer and type in the following to create an SSH tunnel.Ĭreate a project in PhpStorm, if you have not done that already. If you do not use the extension, you will need to set the GET/POST or COOKIE parameter manually. It is not a mandatory step, but you may want to do that to simplify debugger activation. Xdebug.profiler_output_name='debug-cachegrind.out' Parameter descriptions to get a better understanding of what is what. Install and enable Xdebug for PHP as per the documentation. We will not dive into the extensive features of PhpStorm in this article. Below you will find the five steps you need to make to start debugging. This article covers setting up debugging with the help of PhpStorm relying on Xdebug, when the project resides on a remote server. With Xdebig, the developer spends less time finding out the reasons behind errors and understanding the logic of operation of an unknown block of code. This extension boosts developer’s productivity by speeding up the debugging information loop.

Xdebug is a PHP extension that, as the name suggests, enables debugging and profiling of PHP scripts.

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