Steps to Enable Xdebug for PHP Profiling

By Yi Wang and Mangesh Sangapu

1. Find the matching version of xdebug extension from “D:\devtools\xdebug\2.4.0\“,for example, if you have PHP 5.6, use “D:\devtools\xdebug\2.4.0\php_5.6\php_xdebug-2.4.0-5.6-vc11-nts.dll”. To access D: drive, use Kudu <your-website-name>.scm.azurewebsites.net, or “Advanced Tools” in Azure portal,

1. Add Xdebug extension in Application Settings->App settings: PHP_ZENDEXTENSIONS = D:\devtools\xdebug\2.4.0\php_5.6\php_xdebug-2.4.0-5.6-vc11-nts.dll 

1. Create Xdebug profile output directory “D:\home\site\wwwroot\bin\xdebug_profiles”

2. Create “D:\home\site\wwwroot\.user.ini”, add follow in settings in “.user.ini”

   xdebug.profiler_enable=0 xdebug.profiler_output_dir=”D:\home\site\wwwroot\bin\xdebug_profiles” xdebug.profiler_enable_trigger=1

   (Note: To enable Xdebug all the time, set “xdebug.profiler_enable=1”, and remove “xdebug.profiler_enable_trigger” )

3. Trigger Xdebug profiling as “http://<your-site>/<page-name>.php?XDEBUG_PROFILE=1”

  Additional Settings To append the filename to the xdebug output filename, use the following setting in .user.ini: xdebug.trace_output_name = cachegrind.out.%s

Specifier	Meaning	Example Format	Example Filename
%s	script name 2	cachegrind.out.%s	cachegrind.out._home_httpd_html_test_xdebug_test_php

 

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Links to Xdebug Profile Viewers

Wincache Grind

QCacheGrind   Xdebug Reference Documentation https://xdebug.org/docs/   More reference Troubleshooting PHP Performance in Microsoft Azure Web Sites with Xdebug