Xdebug and an introduction to Zend Magic

• 4 extra generated opcodes:

• EXT_FCALL_BEGIN

• EXT_FCALL_END

• EXT_STMT

• EXT_NOP

• Handlers can be bounded

• Can be activated with the -e option:


$ php -h | grep '\-e'
-e    Generate extended information for debugger/profiler