Post on 15-Feb-2017
Essential DebuggingPHP Debugging techniques, tips & tricks
Kaloyan RaevZend / Rogue Wave
$ whoamiZend Studio Team Lead
Eclipse Committer
Live in Sofia, Bulgaria
Skier
Why Debugging?
Because we make bugs
Because we want to fix them!
Debugging in PHP 101
echo $myvar;
var_dump ( $myvar );
die ( "Unexpected value in myvar: $myvar" );
error_reporting ( E_ALL );
Better Way?
Use a debugger!
Breakpoints
$left == 10
Stack Traces
Variables Overview
Fine Execution Control
Changes in Last Step
In-Editor Inspections
Shift + Ctrl + I
Watched Expressions
Multiple Sessions
PHP Debugger Engines
Xdebug
Zend Debugger
phpdbg
Xdebug Zend Debugger phpdbg
Built-in PHP ✅
Communication protocol DBGpXML-based
binaryPHP-specific
ownXML-based
Available in PHP 7 (as of today) ✅
IDE Support ✅ ✅
Remote Debugging ✅ ✅ ✅
Profiling ✅ ✅
The Easiest Way for Setting Up PHP with Debugger
Out of the box!
v8.5 provides both Xdebug and Zend Debugger
Docker Containers
tommylau/xdebug - Apache + PHP + Xdebug
Tutorial: Debugging PHP Web Apps in a Docker Container
Just CLI Scripts
Zend Studio bundles PHP binaries with Zend Debugger included
No IDEs Pleasephpdbg is for you
Built-in PHP since 5.6 as SAPI module
CLI user interface
Do It Yourself Stack
Instructions for Zend Debugger
Instructions for Xdebug
Instructions for phpdbg
Browser Toolbars
Xdebug
Zend Debugger
Browser Toolbar
Debug Engine
IDE
1. Request with debug cookie
1. Request broadcast port
2. Ope
n deb
ug se
ssion
4. Ope
n deb
ug se
ssion
2. Response with debug info
3. Request
Xdebug Toolbars
Chrome
➢ Xdebug helper
➢ Xdebug enabler
Firefox
➢ The easiest Xdebug
➢ easy Xdebug
Opera
➢ Xdebug
➢ Xdebug launcher
Safari
➢ Xdebug Toggler
Zend Debugger ToolbarsChrome
➢ zDebug
Firefox
➢ Zend Firefox Toolbar
Internet Explorer
➢ Zend Internet Explorer Toolbar
Z-Ray
Z-Ray Live!
Remote DebuggingIntranet
Direct Internet Connection
Firewall / Proxy
➢ SSH Tunneling - works for both Xdebug and Zend Debugger
➢ Zend Debugger Tunneling - easier to setup, does not require Zend Server
Debug Mode
Every request to server triggers a new debug session in IDE
Useful for debugging requests from mobile apps
Available only for Zend Debugger in Zend Server
Thank you!
Rate this talk: https://joind.in/15612
Follow me: @kaloyanraev