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  • php 对象的执行

    1.BNF范式

    %token T_OBJECT_OPERATOR "-> (T_OBJECT_OPERATOR)"

    unticked_statement:
    | expr ';' { zend_do_free(&$1 TSRMLS_CC); } expr: r_variable { $$ = $1; } | expr_without_variable { $$ = $1; } ; r_variable: variable { zend_do_end_variable_parse(&$1, BP_VAR_R, 0 TSRMLS_CC); $$ = $1; } ;
    //object_property可能是成员变量,可能是成员函数,可产生$obj->xx->xx()的形式
    variable: base_variable_with_function_calls T_OBJECT_OPERATOR { zend_do_push_object(
    &$1 TSRMLS_CC); } object_property { zend_do_push_object(&$4 TSRMLS_CC); } method_or_not variable_properties { zend_do_pop_object(&$$ TSRMLS_CC); $$.EA = $1.EA | ($7.EA ? $7.EA : $6.EA); } | base_variable_with_function_calls { $$ = $1; } ;

      base_variable_with_function_calls:
        base_variable { $$ = $1; }
      ;

    
    

      base_variable:
        reference_variable { $$ = $1; $$.EA = ZEND_PARSED_VARIABLE; }
      ;

    
    
     reference_variable:
        |    compound_variable            { zend_do_begin_variable_parse(TSRMLS_C); fetch_simple_variable(&$$, &$1, 1 TSRMLS_CC); }
     ;
    
    compound_variable:
            T_VARIABLE            { $$ = $1; }
        |    '$' '{' expr '}'    { $$ = $3; }
    ;
    object_property: 
      object_dim_list { $$
    = $1; }
    ;

      object_dim_list:

        variable_name { znode tmp_znode; zend_do_pop_object(&tmp_znode TSRMLS_CC); zend_do_fetch_property(&$$, &tmp_znode, &$1 TSRMLS_CC);}
      ;

    
    

      variable_name:
      T_STRING { $$ = $1; }
      ;

      

     

     variable_properties:
       variable_properties variable_property { $$.EA = $2.EA; }
       | /* empty */ { $$.EA = 0; }
       ;

     variable_property:
        T_OBJECT_OPERATOR object_property { zend_do_push_object(&$2 TSRMLS_CC); } method_or_not { $$.EA = $4.EA; }
      ;

    
    method_or_not:
            method                        { $$ = $1; $$.EA = ZEND_PARSED_METHOD_CALL; zend_do_push_object(&$$ TSRMLS_CC); }
        |    array_method_dereference    { $$ = $1; zend_do_push_object(&$$ TSRMLS_CC); }
        |    /* empty */ { $$.EA = ZEND_PARSED_MEMBER; }
    ;
    
    method:
            '(' { zend_do_pop_object(&$1 TSRMLS_CC); zend_do_begin_method_call(&$1 TSRMLS_CC); }
                    function_call_parameter_list ')'
                { zend_do_end_function_call(&$1, &$$, &$3, 1, 1 TSRMLS_CC); zend_do_extended_fcall_end(TSRMLS_C); }
    ;

     

    1对于$this->abc中的$this

    void fetch_simple_variable_ex(znode *result, znode *varname, int bp, zend_uchar op TSRMLS_DC) /* {{{ */
    {
        zend_op opline;
        zend_op *opline_ptr;
        zend_llist *fetch_list_ptr;
    
        if (varname->op_type == IS_CONST) {
            ulong hash;
    
            
            //如果不是以$this开头的变量,根据lookup_cv函数,在active_syymble_table变量中增加一个key
            hash = str_hash(Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant));
            if (!zend_is_auto_global_quick(Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant), hash TSRMLS_CC) &&
                !(Z_STRLEN(varname->u.constant) == (sizeof("this")-1) &&
                  !memcmp(Z_STRVAL(varname->u.constant), "this", sizeof("this") - 1)) &&
                (CG(active_op_array)->last == 0 ||
                 CG(active_op_array)->opcodes[CG(active_op_array)->last-1].opcode != ZEND_BEGIN_SILENCE)) {
                result->op_type = IS_CV;
                result->u.op.var = lookup_cv(CG(active_op_array), Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant), hash TSRMLS_CC);
                Z_STRVAL(varname->u.constant) = (char*)CG(active_op_array)->vars[result->u.op.var].name;
                result->EA = 0;
                return;
            }
        }
    
        if (bp) {
            opline_ptr = &opline;
            init_op(opline_ptr TSRMLS_CC);
        } else {
            opline_ptr = get_next_op(CG(active_op_array) TSRMLS_CC);
        }
    
        opline_ptr->opcode = op;
        opline_ptr->result_type = IS_VAR;
        opline_ptr->result.var = get_temporary_variable(CG(active_op_array));
        SET_NODE(opline_ptr->op1, varname);
        GET_NODE(result, opline_ptr->result);
        SET_UNUSED(opline_ptr->op2);
        opline_ptr->extended_value = ZEND_FETCH_LOCAL;
    
        if (varname->op_type == IS_CONST) {
            CALCULATE_LITERAL_HASH(opline_ptr->op1.constant);
            if (zend_is_auto_global_quick(Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant), Z_HASH_P(&CONSTANT(opline_ptr->op1.constant)) TSRMLS_CC)) {
                opline_ptr->extended_value = ZEND_FETCH_GLOBAL;
            }
        }
    
        if (bp) {
            zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
            zend_llist_add_element(fetch_list_ptr, opline_ptr);
        }
    }
    /* }}} */
    
    void fetch_simple_variable(znode *result, znode *varname, int bp TSRMLS_DC) /* {{{ */
    {
        /* the default mode must be Write, since fetch_simple_variable() is used to define function arguments */
        fetch_simple_variable_ex(result, varname, bp, ZEND_FETCH_W TSRMLS_CC);
    }

     zend_do_fetch_property

    void zend_do_fetch_property(znode *result, znode *object, const znode *property TSRMLS_DC) /* {{{ */
    {
        zend_op opline;
        zend_llist *fetch_list_ptr;
    
        zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
    
        if (object->op_type == IS_CV) {
            if (object->u.op.var == CG(active_op_array)->this_var) {
                object->op_type = IS_UNUSED; /* this means $this for objects */
            }
        } else if (fetch_list_ptr->count == 1) {
        //针对于$abc=1;或$this->abc=1;的这种情况
        //对$abc或$this已经进行了fetch_simple_variable函数处理了
            zend_llist_element *le = fetch_list_ptr->head;
            zend_op *opline_ptr = (zend_op *) le->data;
    
            if (opline_is_fetch_this(opline_ptr TSRMLS_CC)) {
                zend_del_literal(CG(active_op_array), opline_ptr->op1.constant);
                SET_UNUSED(opline_ptr->op1); /* this means $this for objects */
                SET_NODE(opline_ptr->op2, property);
                /* if it was usual fetch, we change it to object fetch */
                switch (opline_ptr->opcode) {
                    case ZEND_FETCH_W:
                        opline_ptr->opcode = ZEND_FETCH_OBJ_W;
                        break;
                    case ZEND_FETCH_R:
                        opline_ptr->opcode = ZEND_FETCH_OBJ_R;
                        break;
                }
                if (opline_ptr->op2_type == IS_CONST && Z_TYPE(CONSTANT(opline_ptr->op2.constant)) == IS_STRING) {
                    CALCULATE_LITERAL_HASH(opline_ptr->op2.constant);
                    GET_POLYMORPHIC_CACHE_SLOT(opline_ptr->op2.constant);
                }
                GET_NODE(result, opline_ptr->result);
                return;
            }
        }
    
        if (zend_is_function_or_method_call(object)) {
            init_op(&opline TSRMLS_CC);
            opline.opcode = ZEND_SEPARATE;
            SET_NODE(opline.op1, object);
            SET_UNUSED(opline.op2);
            opline.result_type = IS_VAR;
            opline.result.var = opline.op1.var;
            zend_llist_add_element(fetch_list_ptr, &opline);
        }
    
        init_op(&opline TSRMLS_CC);
        opline.opcode = ZEND_FETCH_OBJ_W;    /* the backpatching routine assumes W */
        opline.result_type = IS_VAR;
        opline.result.var = get_temporary_variable(CG(active_op_array));
        SET_NODE(opline.op1, object);
        SET_NODE(opline.op2, property);
        if (opline.op2_type == IS_CONST && Z_TYPE(CONSTANT(opline.op2.constant)) == IS_STRING) {
            CALCULATE_LITERAL_HASH(opline.op2.constant);
            GET_POLYMORPHIC_CACHE_SLOT(opline.op2.constant);
        }
        GET_NODE(result, opline.result);
    
        zend_llist_add_element(fetch_list_ptr, &opline);
    }

    2函数 zend_do_begin_method_call

     

    void zend_do_begin_method_call(znode *left_bracket TSRMLS_DC) /* {{{ */
    {
        zend_op *last_op;
        int last_op_number;
        unsigned char *ptr = NULL;
        //代码省略
        last_op_number = get_next_op_number(CG(active_op_array))-1; //$obj->func()
        last_op = &CG(active_op_array)->opcodes[last_op_number];
        //代码省略
        if (last_op->opcode == ZEND_FETCH_OBJ_R) {
            if (last_op->op2_type == IS_CONST) {
                zval name;
                name = CONSTANT(last_op->op2.constant);
                if (Z_TYPE(name) != IS_STRING) {
                    zend_error(E_COMPILE_ERROR, "Method name must be a string");
                } 
                if (!IS_INTERNED(Z_STRVAL(name))) {
                    Z_STRVAL(name) = estrndup(Z_STRVAL(name), Z_STRLEN(name));
                }
                FREE_POLYMORPHIC_CACHE_SLOT(last_op->op2.constant);
                last_op->op2.constant =
                    zend_add_func_name_literal(CG(active_op_array), &name TSRMLS_CC);
                GET_POLYMORPHIC_CACHE_SLOT(last_op->op2.constant);
            }
            last_op->opcode = ZEND_INIT_METHOD_CALL;
            SET_UNUSED(last_op->result);
            Z_LVAL(left_bracket->u.constant) = ZEND_INIT_FCALL_BY_NAME;
        } else {
        }    
    }

    ZEND_INIT_METHOD_CALL 取出函数体EX(fbc) 

    static int ZEND_FASTCALL  ZEND_INIT_METHOD_CALL_SPEC_CV_CONST_HANDLER(ZEND_OPCODE_HANDLER_ARGS)
    {
        USE_OPLINE
        zval *function_name;
        char *function_name_strval;
        int function_name_strlen;
    
    
        SAVE_OPLINE();
        zend_ptr_stack_3_push(&EG(arg_types_stack), EX(fbc), EX(object), EX(called_scope));
    
        function_name = opline->op2.zv;
    
        if (IS_CONST != IS_CONST &&
            UNEXPECTED(Z_TYPE_P(function_name) != IS_STRING)) {
            zend_error_noreturn(E_ERROR, "Method name must be a string");
        }
    
        function_name_strval = Z_STRVAL_P(function_name);
        function_name_strlen = Z_STRLEN_P(function_name);
    
        EX(object) = _get_zval_ptr_cv_BP_VAR_R(EX_CVs(), opline->op1.var TSRMLS_CC);
    
        if (EXPECTED(EX(object) != NULL) &&
            EXPECTED(Z_TYPE_P(EX(object)) == IS_OBJECT)) {
            EX(called_scope) = Z_OBJCE_P(EX(object));
    
            if (IS_CONST != IS_CONST ||
                (EX(fbc) = CACHED_POLYMORPHIC_PTR(opline->op2.literal->cache_slot, EX(called_scope))) == NULL) {
                zval *object = EX(object);
    
                if (UNEXPECTED(Z_OBJ_HT_P(EX(object))->get_method == NULL)) {
                    zend_error_noreturn(E_ERROR, "Object does not support method calls");
                }
    
                /* First, locate the function. */

    //获取所调用方法的 fbc EX(fbc) = Z_OBJ_HT_P(EX(object))->get_method(&EX(object), function_name_strval, function_name_strlen, ((IS_CONST == IS_CONST) ? (opline->op2.literal + 1) : NULL) TSRMLS_CC); if (UNEXPECTED(EX(fbc) == NULL)) { zend_error_noreturn(E_ERROR, "Call to undefined method %s::%s()", Z_OBJ_CLASS_NAME_P(EX(object)), function_name_strval); } if (IS_CONST == IS_CONST && EXPECTED(EX(fbc)->type <= ZEND_USER_FUNCTION) && EXPECTED((EX(fbc)->common.fn_flags & (ZEND_ACC_CALL_VIA_HANDLER|ZEND_ACC_NEVER_CACHE)) == 0) && EXPECTED(EX(object) == object)) { CACHE_POLYMORPHIC_PTR(opline->op2.literal->cache_slot, EX(called_scope), EX(fbc)); } } } else { zend_error_noreturn(E_ERROR, "Call to a member function %s() on a non-object", function_name_strval); } if ((EX(fbc)->common.fn_flags & ZEND_ACC_STATIC) != 0) { EX(object) = NULL; } else { if (!PZVAL_IS_REF(EX(object))) { Z_ADDREF_P(EX(object)); /* For $this pointer */ } else { zval *this_ptr; ALLOC_ZVAL(this_ptr); INIT_PZVAL_COPY(this_ptr, EX(object)); zval_copy_ctor(this_ptr); EX(object) = this_ptr; } } CHECK_EXCEPTION(); ZEND_VM_NEXT_OPCODE(); }

     

    static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(zval ***CVs, zend_uint var TSRMLS_DC)
    {
        zval ***ptr = &CV(var);
    
        if (UNEXPECTED(*ptr == NULL)) {
            return *_get_zval_cv_lookup_BP_VAR_R(ptr, var TSRMLS_CC);
        }
        return **ptr;
    }
    
    static zend_never_inline zval **_get_zval_cv_lookup_BP_VAR_R(zval ***ptr, zend_uint var TSRMLS_DC)
    {
        zend_compiled_variable *cv = &CV_DEF_OF(var);
    
        if (!EG(active_symbol_table) ||
            zend_hash_quick_find(EG(active_symbol_table), cv->name, cv->name_len+1, cv->hash_value, (void **)ptr)==FAILURE) {
            zend_error(E_NOTICE, "Undefined variable: %s", cv->name);
            return &EG(uninitialized_zval_ptr);
        }
        return *ptr;
    }

     

    typedef union _zend_function *(*zend_object_get_method_t)(zval **object_ptr, char *method, int method_len, const struct _zend_literal *key TSRMLS_DC);
    
    static union _zend_function *zend_std_get_method(zval **object_ptr, char *method_name, int method_len, const zend_literal *key TSRMLS_DC) /* {{{ */
    {
        zend_function *fbc;
        zval *object = *object_ptr;
        zend_object *zobj = Z_OBJ_P(object);
        ulong hash_value;
        char *lc_method_name;
        ALLOCA_FLAG(use_heap)
    
        if (EXPECTED(key != NULL)) {
            lc_method_name = Z_STRVAL(key->constant);
            hash_value = key->hash_value;
        } else {
            lc_method_name = do_alloca(method_len+1, use_heap);
            /* Create a zend_copy_str_tolower(dest, src, src_length); */
            zend_str_tolower_copy(lc_method_name, method_name, method_len);
            hash_value = zend_hash_func(lc_method_name, method_len+1);
        }
    
        if (UNEXPECTED(zend_hash_quick_find(&zobj->ce->function_table, lc_method_name, method_len+1, hash_value, (void **)&fbc) == FAILURE)) {
            if (UNEXPECTED(!key)) {
                free_alloca(lc_method_name, use_heap);
            }
            if (zobj->ce->__call) {
                return zend_get_user_call_function(zobj->ce, method_name, method_len);
            } else {
                return NULL;
            }
        }
    
        /* Check access level */
    //如果此方法是私有方法,检查其作用域 if (fbc->op_array.fn_flags & ZEND_ACC_PRIVATE) { zend_function *updated_fbc; /* Ensure that if we're calling a private function, we're allowed to do so. * If we're not and __call() handler exists, invoke it, otherwise error out. */ updated_fbc = zend_check_private_int(fbc, Z_OBJ_HANDLER_P(object, get_class_entry)(object TSRMLS_CC), lc_method_name, method_len, hash_value TSRMLS_CC); if (EXPECTED(updated_fbc != NULL)) { fbc = updated_fbc; } else { if (zobj->ce->__call) { fbc = zend_get_user_call_function(zobj->ce, method_name, method_len); } else { zend_error_noreturn(E_ERROR, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), method_name, EG(scope) ? EG(scope)->name : ""); } } } else { /* Ensure that we haven't overridden a private function and end up calling * the overriding public function... */

       
     // zend_do_begin_function_declaration
         //   op_array.scope = is_method?CG(active_class_entry):NULL;

           // zend_do_fcall_common_helper_SPEC

            //  EG(scope) = (fbc->type == ZEND_USER_FUNCTION || !EX(object)) ? fbc->common.scope : NULL;

            if (EG(scope) &&
                is_derived_class(fbc->common.scope, EG(scope)) &&
                fbc->op_array.fn_flags & ZEND_ACC_CHANGED) {
                zend_function *priv_fbc;
    
                if (zend_hash_quick_find(&EG(scope)->function_table, lc_method_name, method_len+1, hash_value, (void **) &priv_fbc)==SUCCESS
                    && priv_fbc->common.fn_flags & ZEND_ACC_PRIVATE
                    && priv_fbc->common.scope == EG(scope)) {
                    fbc = priv_fbc;
                }
            }

    //是否是protected方法
    if ((fbc->common.fn_flags & ZEND_ACC_PROTECTED)) { /* Ensure that if we're calling a protected function, we're allowed to do so. * If we're not and __call() handler exists, invoke it, otherwise error out. */ if (UNEXPECTED(!zend_check_protected(zend_get_function_root_class(fbc), EG(scope)))) { if (zobj->ce->__call) { fbc = zend_get_user_call_function(zobj->ce, method_name, method_len); } else { zend_error_noreturn(E_ERROR, "Call to %s method %s::%s() from context '%s'", zend_visibility_string(fbc->common.fn_flags), ZEND_FN_SCOPE_NAME(fbc), method_name, EG(scope) ? EG(scope)->name : ""); } } } } if (UNEXPECTED(!key)) { free_alloca(lc_method_name, use_heap); } return fbc; }

     

    检测调用的方法的作用域,一般来说 父类的private方法 被子类复制,但由于该方法的scope还是父类,所以不能被调用

    static inline zend_function *zend_check_private_int(zend_function *fbc, zend_class_entry *ce, char *function_name_strval, int function_name_strlen, ulong hash_value TSRMLS_DC) /* {{{ */
    {
        if (!ce) {
            return 0;
        }
    
        /* We may call a private function if:
         * 1.  The class of our object is the same as the scope, and the private
         *     function (EX(fbc)) has the same scope.
         * 2.  One of our parent classes are the same as the scope, and it contains
         *     a private function with the same name that has the same scope.
         */
        if (fbc->common.scope == ce && EG(scope) == ce) {
            /* rule #1 checks out ok, allow the function call */
            return fbc;
        }
    
    
        /* Check rule #2 */
        ce = ce->parent;
        while (ce) {
            if (ce == EG(scope)) {
                if (zend_hash_quick_find(&ce->function_table, function_name_strval, function_name_strlen+1, hash_value, (void **) &fbc)==SUCCESS
                    && fbc->op_array.fn_flags & ZEND_ACC_PRIVATE
                    && fbc->common.scope == EG(scope)) {
                    return fbc;
                }
                break;
            }
            ce = ce->parent;
        }
        return NULL;
    }

     

    3.ZEND_DO_END_FUNCTION_CALL 函数

    void zend_do_end_function_call(znode *function_name, znode *result, const znode *argument_list, int is_method, int is_dynamic_fcall TSRMLS_DC) /* {{{ */
    {
        zend_op *opline;
    
        if (is_method && function_name && function_name->op_type == IS_UNUSED) {
            /* clone */
            //省略
        } else {
            opline = get_next_op(CG(active_op_array) TSRMLS_CC);
            if (!is_method && !is_dynamic_fcall && function_name->op_type==IS_CONST) {
                //省略
            } else {
                opline->opcode = ZEND_DO_FCALL_BY_NAME;
                SET_UNUSED(opline->op1);
            }
        }
    
        opline->result.var = get_temporary_variable(CG(active_op_array));
        opline->result_type = IS_VAR;
        GET_NODE(result, opline->result)    ;
        SET_UNUSED(opline->op2);
    
        zend_stack_del_top(&CG(function_call_stack));
        opline->extended_value = Z_LVAL(argument_list->u.constant);
    }

     

     

    4. ZEND_DO_FCALL_BY_NAME 函数

    static int ZEND_FASTCALL  ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER(ZEND_OPCODE_HANDLER_ARGS)
    {
        EX(function_state).function = EX(fbc);
        return zend_do_fcall_common_helper_SPEC(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU);
    }

     

     各种检测,然后将fbc->op_array 赋值给 EG(active_op_array)

    static int ZEND_FASTCALL zend_do_fcall_common_helper_SPEC(ZEND_OPCODE_HANDLER_ARGS)
    {
        USE_OPLINE
        zend_bool should_change_scope = 0;
        zend_function *fbc = EX(function_state).function;
    
        SAVE_OPLINE();
        if (UNEXPECTED((fbc->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_DEPRECATED)) != 0)) {
            if (UNEXPECTED((fbc->common.fn_flags & ZEND_ACC_ABSTRACT) != 0)) {
                zend_error_noreturn(E_ERROR, "Cannot call abstract method %s::%s()", fbc->common.scope->name, fbc->common.function_name);
                CHECK_EXCEPTION();
                ZEND_VM_NEXT_OPCODE(); /* Never reached */
            }
            if (UNEXPECTED((fbc->common.fn_flags & ZEND_ACC_DEPRECATED) != 0)) {
                zend_error(E_DEPRECATED, "Function %s%s%s() is deprecated",
                    fbc->common.scope ? fbc->common.scope->name : "",
                    fbc->common.scope ? "::" : "",
                    fbc->common.function_name);
            }
        }
        if (fbc->common.scope &&
            !(fbc->common.fn_flags & ZEND_ACC_STATIC) &&
            !EX(object)) {
    
            if (fbc->common.fn_flags & ZEND_ACC_ALLOW_STATIC) {
                /* FIXME: output identifiers properly */
                zend_error(E_STRICT, "Non-static method %s::%s() should not be called statically", fbc->common.scope->name, fbc->common.function_name);
            } else {
                /* FIXME: output identifiers properly */
                /* An internal function assumes $this is present and won't check that. So PHP would crash by allowing the call. */
                zend_error_noreturn(E_ERROR, "Non-static method %s::%s() cannot be called statically", fbc->common.scope->name, fbc->common.function_name);
            }
        }
    
        if (fbc->type == ZEND_USER_FUNCTION || fbc->common.scope) {
            should_change_scope = 1;
            EX(current_this) = EG(This);
            EX(current_scope) = EG(scope);
            EX(current_called_scope) = EG(called_scope);
            EG(This) = EX(object);
            EG(scope) = (fbc->type == ZEND_USER_FUNCTION || !EX(object)) ? fbc->common.scope : NULL;
            EG(called_scope) = EX(called_scope);
        }
    
        zend_arg_types_stack_3_pop(&EG(arg_types_stack), &EX(called_scope), &EX(current_object), &EX(fbc));
        EX(function_state).arguments = zend_vm_stack_push_args(opline->extended_value TSRMLS_CC);
        LOAD_OPLINE();
    
        if (fbc->type == ZEND_INTERNAL_FUNCTION) {
        //内部函数,不用管    
        } else if (fbc->type == ZEND_USER_FUNCTION) {
            EX(original_return_value) = EG(return_value_ptr_ptr);
            EG(active_symbol_table) = NULL;
            EG(active_op_array) = &fbc->op_array;
            EG(return_value_ptr_ptr) = NULL;
            if (RETURN_VALUE_USED(opline)) {
                temp_variable *ret = &EX_T(opline->result.var);
    
                ret->var.ptr = NULL;
                EG(return_value_ptr_ptr) = &ret->var.ptr;
                ret->var.ptr_ptr = &ret->var.ptr;
                ret->var.fcall_returned_reference = (fbc->common.fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
            }
    
            if (EXPECTED(zend_execute == execute)) {
                if (EXPECTED(EG(exception) == NULL)) {
                    ZEND_VM_ENTER();
                }
            } 
    }

     

     

     

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  • 原文地址:https://www.cnblogs.com/taek/p/4138033.html
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