Re: Doc on the VM

Hi! Mathieu Suen schrieb: > Hi, > > I would like to know if there is some documentation on the different > layout of the array, object varaible ... in php. > Or were in the source can we read how the php VM reprensent those entites? At first, you should have a look at Zend/zend.h in the php source tree. There you'll find the definition of a "php variable", the zval struct: struct _zval_struct { /* Variable information */ zvalue_value value; /* value */ zend_uint refcount__gc; zend_uchar type; /* active type */ zend_uchar is_ref__gc; }; The content of the variable is: typedef union _zvalue_value { long lval; /* long value */ double dval; /* double value */ struct { char *val; int len; } str; HashTable *ht; /* hash table value */ zend_object_value obj; } zvalue_value; Since a php variable can contain any type php has to offer, this representation was choosen in order to simplify access on the internal side. There's a bunch of macros for creating zvals, getting/setting types/values, etc. so you don't need to do this by hand (of course, in complex cases you have to). Does this help? greetings, Nico