CODEWITHSUNDEEP
phpapacheubuntu-16.04xdebugphp-7
Greg Cobb
Greg Cobb

Reputation: 475

Code only works if I use the Xdebug extension

When I started my latest project I learned how to use the xdebug extension and I have been using it ever since. Now I am ready to spin up a server and go in to production with this project and my site doesn't fully work. The frontend pages seem to work, which are php based as well, but the backend endpoints that query the database and return some data to the frontend always are returning a 500 status code. So I attach xdebug and figure out how to run it remotely and the pages all start working without any code changes. I go in to the php.ini file and turn it back off and the pages continue to work. Since this is an AWS EC2 server, I delete the instance and create a new one running the same initialization scripts I wrote to install all the software and I get the exact same issue. The server doesn't work until I follow the xdebug install instructions and restart apache2. And like before even when I unattach the xdebug extension via the php.ini file, the code continues to work. Even after the system is rebooted it still continues to work so whatever is being fixed appears to be permanent.

What would building and attaching the xdebug extension, and restarting Apache2, do to the a LAMP stack that would make my code work, even after the extension has been turned off? My server is being built with scripts that run various apt-get install commands with no binaries provided by me as it all is community provided programs. Like clockwork it breaks every time I rebuild the machine until I apply the extension. I can automate that in to my build scripts if I have to, but it is driving me a bit nuts that I don't understand what is happening.

Upvotes: 0

Views: 159

Answers (3)

linden2015
linden2015

Reputation: 887

What would building and attaching the xdebug extension, and restarting Apache2, do to the a LAMP stack that would make my code work, even after the extension has been turned off?

Installing one piece of software can bring with it another. If you sudo apt install php-xdebug without php installed, it will install php.

Upvotes: 0

Auskennfuchs
Auskennfuchs

Reputation: 1737

When the server sends a 500 error, normally you get an entry to the php_error.log. So first check this file. Maybe there is some difference in memory limits, max. post variables etc.

Upvotes: 2

Goodnickoff
Goodnickoff

Reputation: 2267

I would suggest you to try to find calls of any xdebug specific functions such as var_dump() or any prefixed by xdebug_ in your code: https://xdebug.org/docs/all_functions

Upvotes: 0

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