Xdebug

About me

  • Vo Xuan Tien
  • Drupal developer
  • GO1
  • 2 years experience

Outline

  • Installation
  • Features
  • Demo

Installation

Ubuntu

sudo apt-get install php5-xdebug

CentOS, Fedora, RHEL, etc.

yum install php-pecl-xdebug.x86_64

Mac OSX using Homebrew

brew tap josegonzalez/homebrew-php
brew install php55-xdebug

Windows

Download .dll files
from http://xdebug.org/download.php

Compile from source

wget http://xdebug.org/files/xdebug-2.3.2.tgz
tar -xvf xdebug-2.3.2.tgz
cd xdebug-2.3.2
phpize && ./configure && make
sudo cp modules/xdebug.so /usr/lib/php5/20121212/

Wizard

Paste your phpinfo() here:
http://xdebug.org/wizard.php

Configuration
(localhost)

; /etc/php5/mods-available/xdebug.ini
zend_extension=xdebug.so

[xdebug]
xdebug.remote_host=localhost
xdebug.remote_connect_back=0
xdebug.remote_enable=1
xdebug.remote_autostart = 0
xdebug.default_enable = 1
xdebug.remote_handler=dbgp
xdebug.remote_port=9000
xdebug.idekey=”netbeans-xdebug”
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger = 1

Configuration
(lan)

; /etc/php5/mods-available/xdebug.ini
zend_extension=xdebug.so

[xdebug]
xdebug.remote_host=192.168.1.234
xdebug.remote_connect_back=0
xdebug.remote_enable=1
xdebug.remote_autostart = 0
xdebug.default_enable = 1
xdebug.remote_handler=dbgp
xdebug.remote_port=9000
xdebug.idekey=”netbeans-xdebug”
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger = 1

Configuration
(virtualbox)

; /etc/php5/mods-available/xdebug.ini
zend_extension=xdebug.so

[xdebug]
xdebug.remote_host=192.168.56.1
xdebug.remote_connect_back=0
xdebug.remote_enable=1
xdebug.remote_autostart = 0
xdebug.default_enable = 1
xdebug.remote_handler=dbgp
xdebug.remote_port=9000
xdebug.idekey=”netbeans-xdebug”
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger = 1

Configuration
(unknow ip)

; /etc/php5/mods-available/xdebug.ini
zend_extension=xdebug.so

[xdebug]
; xdebug.remote_host=localhost
xdebug.remote_connect_back=1
xdebug.remote_enable=1
xdebug.remote_autostart = 0
xdebug.default_enable = 1
xdebug.remote_handler=dbgp
xdebug.remote_port=9000
xdebug.idekey=”netbeans-xdebug”
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger = 1

Debug
(bash)

; ~/.bashrc
export XDEBUG_CONFIG="idekey=netbeans-xdebug"

Profiling
(bash)

; ~/.bashrc
export XDEBUG_CONFIG="profiler_enable=1"

; Or
alias phpx='XDEBUG_CONFIG="profiler_enable=1" php'

Configuration
(firewalls)

#!/bin/sh
# Set-up a tunnel
ssh -R 9000:localhost:9000 username@dev.example.com

Configuration
(path mapping)

Features

  • Remote debugging
  • Code coverage analysis
  • Profiling PHP scripts

Remote debugging

  • We need a client (PHPStorm, Netbeans)
  • Make sure client listen for debug connections.
  • We need to start a debug session
  • We can start debug session via:
    • Command line
    • Web browser
    • Browser extension for FF, Chrome, Safari, Opera

Code coverage analysis

  • Tell you which lines of script (or set of scripts) have been executed during a request
  • Tell you how good your unit tests are

Profiling PHP scripts

  • Determine bottle neck
  • We need a tool to read output
    • KCacheGrind
    • WinCacheGrind
    • Webgrind

Demo

Debug web app

Demo

Debug console app

Demo

Code coverage

Demo

Profiling

References

Q&A

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