Inject code within Compiler?

Trying implement empty getter/setter syntax such as: public $Hours { get; set; } Is there any way to "inject" code into the compile process? I'm trying via (just some proof of concept code, ignore the buffer overrun potential) char injected_code[1024] = ""; sprintf((char*)&injected_code, "{ return $this->%s; }", Z_STRVAL(var_name->u.constant)); znode *injected_node = emalloc(sizeof(znode)); Z_STRVAL(injected_node->u.constant) = (char*)&injected_code; Z_STRLEN(injected_node->u.constant) = strlen(injected_code); zend_do_abstract_method(function_token, modifiers, injected_node TSRMLS_CC); However this is causing a segfault, I'm assuming this is because I'm not initializing something of the znode properly. How can I do this? Thanks, -Clint