Remote debugging with XDebug
Tom Adam
How are you debugging?
- XDebug
- var_dump, echo and die
- Enhanced var_dump
- Logging
- Unit testing
Interactive Debugging
- Variable editing
- Stack trace
- Conditional breakpoints
- Remote debugging
- Execution line alteration
XDebug
- Supports up to PHP 7.1
- Easily installed
- Lots of useful features
- Supported by most IDE's
Demo
- XDebug client, IDE server
- Enable module
-
xdebug.remote_enable = 1
- Use browser plugin
Config
Chrome: https://chrome.google.com/webstore/detail/xdebug-helper
export XDEBUG_CONFIG="idekey=session_name"
xdebug.idekey="abc", xdebug.remote_autostart=1
Web
CLI
-
xdebug.remote_host = host ip
-
For web: xdebug.remote_callback = 1
- Check firewall!
Config
Vagrant
- XDebug makes things slow
- Performance issue for CLI apps
- Tests 3x faster
Gotchas
CLI Apps
Fix
- Disable on CLI
- Enable selectively using alias
-
alias php='php -dzend_extension=xdebug.so'
- Long FastCGI timeout
More Gotchas
FPM
Breakpoint positions
- Some won't trigger
- Multi-line statements are usual culprit
Max nesting level
- Default too low before current version
- Set to ~250
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Remote debugging with XDebug
By tomadam
