La dernière version de PHPUnit 3.8 nécessite PHP 5.4 ou 5.5.

1. Installation de PEAR.

Le key-binding par défaut de xdebug est :

[
	{"keys": ["ctrl+f8"], "command": "xdebug_breakpoint"},
	{"keys": ["shift+f8"], "command": "xdebug_conditional_breakpoint"},
	{"keys": ["ctrl+shift+f5"], "command": "xdebug_continue", "args": {"command": "run"}},
	{"keys": ["ctrl+shift+f6"], "command": "xdebug_continue", "args": {"command": "step_over"}},
	{"keys": ["ctrl+shift+f7"], "command": "xdebug_continue", "args": {"command": "step_into"}},
	{"keys": ["ctrl+shift+f8"], "command": "xdebug_continue", "args": {"command": "step_out"}},
	{"keys": ["ctrl+shift+f9"], "command": "xdebug_session_start"},
	{"keys": ["ctrl+shift+f10"], "command": "xdebug_session_stop"},
	{"keys": ["ctrl+shift+f11"], "command": "xdebug_layout", "args": {"keymap" : true}}
]

{
  "tab_size": 4,
  "translate_tabs_to_spaces": false,
  "use_tab_stops": true
}

• http://blog.stuartherbert.com/php/2012/02/28/setting-up-sublime-text-2-for-php-development/