- Make new 'is' operator work with classes only and return false when

- the object isn't of the said class or the value isn't an object.

Zend/zend_compile.c

@@ -2724,23 +2724,16 @@ void zend_do_isset_or_isempty(int type, znode *result, znode *variable TSRMLS_DC
 }
 
 
-void zend_do_is_type(znode *result, znode *expr, znode *class, int type TSRMLS_DC)
+void zend_do_is_class(znode *result, znode *expr, znode *class, int type TSRMLS_DC)
 {
 	zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
 
-	opline->opcode = ZEND_IS_TYPE;
+	opline->opcode = ZEND_IS_CLASS;
 	opline->result.op_type = IS_TMP_VAR;
 	opline->result.u.var = get_temporary_variable(CG(active_op_array));
 	opline->op1 = *expr;
 
-	if (class) {
-		opline->op2 = *class;
-		opline->extended_value = 1;
-	} else {
-		opline->op2.u.constant.value.lval = type;
-		SET_UNUSED(opline->op2);
-		opline->extended_value = 0;
-	}
+	opline->op2 = *class;
 
 	*result = opline->result;
 }

Zend/zend_compile.h

@@ -358,7 +358,7 @@ void zend_do_include_or_eval(int type, znode *result, znode *op1 TSRMLS_DC);
 void zend_do_unset(znode *variable TSRMLS_DC);
 void zend_do_isset_or_isempty(int type, znode *result, znode *variable TSRMLS_DC);
 
-void zend_do_is_type(znode *result, znode *expr, znode *class, int type TSRMLS_DC);
+void zend_do_is_class(znode *result, znode *expr, znode *class, int type TSRMLS_DC);
 
 void zend_do_foreach_begin(znode *foreach_token, znode *array, znode *open_brackets_token, znode *as_token, int variable TSRMLS_DC);
 void zend_do_foreach_cont(znode *value, znode *key, znode *as_token TSRMLS_DC);
@@ -598,7 +598,7 @@ int zendlex(znode *zendlval TSRMLS_DC);
 #define ZEND_ASSIGN_OBJ				136
 #define ZEND_MAKE_VAR				137
 
-#define ZEND_IS_TYPE				138
+#define ZEND_IS_CLASS				138
 
 /* end of block */
 

Zend/zend_execute.c

@@ -3123,16 +3123,10 @@ send_by_ref:
 					}
 				}
 				NEXT_OPCODE();
-			case ZEND_IS_TYPE: {
+			case ZEND_IS_CLASS: {
 					zval *expr = get_zval_ptr(&EX(opline)->op1, EX(Ts), &EG(free_op1), BP_VAR_R);
-					if (EX(opline)->extended_value) {
-						is_type_function(&EX(Ts)[EX(opline)->result.u.var].tmp_var, expr,
-										 EX(Ts)[EX(opline)->op2.u.var].EA.class_entry, 0 TSRMLS_CC);
-					} else {
-						is_type_function(&EX(Ts)[EX(opline)->result.u.var].tmp_var, expr,
-										 NULL, EX(opline)->op2.u.constant.value.lval TSRMLS_CC);
-					}
-
+					is_class_function(&EX(Ts)[EX(opline)->result.u.var].tmp_var, expr,
+										 EX(Ts)[EX(opline)->op2.u.var].EA.class_entry TSRMLS_CC);
 					FREE_OP(EX(Ts), &EX(opline)->op1, EG(free_op1));
 				}
 				NEXT_OPCODE();

Zend/zend_language_parser.y

@@ -67,7 +67,7 @@
 %left '*' '/' '%'
 %right '!' '~' T_INC T_DEC T_INT_CAST T_DOUBLE_CAST T_STRING_CAST T_ARRAY_CAST T_OBJECT_CAST T_BOOL_CAST T_UNSET_CAST '@'
 %right '['
-%nonassoc T_NEW T_IS_TYPE
+%nonassoc T_NEW T_IS_CLASS
 %token T_EXIT
 %token T_IF
 %left T_ELSEIF
@@ -94,7 +94,7 @@
 %token T_ENDFOREACH
 %token T_DECLARE
 %token T_ENDDECLARE
-%token T_IS_TYPE
+%token T_IS_CLASS
 %token T_AS
 %token T_SWITCH
 %token T_ENDSWITCH
@@ -529,14 +529,7 @@ expr_without_variable:
 	|	expr T_IS_SMALLER_OR_EQUAL expr { zend_do_binary_op(ZEND_IS_SMALLER_OR_EQUAL, &$$, &$1, &$3 TSRMLS_CC); }
 	|	expr '>' expr 					{ zend_do_binary_op(ZEND_IS_SMALLER, &$$, &$3, &$1 TSRMLS_CC); }
 	|	expr T_IS_GREATER_OR_EQUAL expr { zend_do_binary_op(ZEND_IS_SMALLER_OR_EQUAL, &$$, &$3, &$1 TSRMLS_CC); }
-	|	expr T_IS_TYPE is_type_expr { zend_do_is_type(&$$, &$1, &$3, 0 TSRMLS_CC); }
-	|	expr T_IS_TYPE T_INT_CAST { zend_do_is_type(&$$, &$1, NULL, IS_LONG TSRMLS_CC); }
-	|	expr T_IS_TYPE T_DOUBLE_CAST { zend_do_is_type(&$$, &$1, NULL, IS_DOUBLE TSRMLS_CC); }
-	|	expr T_IS_TYPE T_STRING_CAST { zend_do_is_type(&$$, &$1, NULL, IS_STRING TSRMLS_CC); }
-	|	expr T_IS_TYPE T_ARRAY_CAST { zend_do_is_type(&$$, &$1, NULL, IS_ARRAY TSRMLS_CC); }
-	|	expr T_IS_TYPE T_OBJECT_CAST { zend_do_is_type(&$$, &$1, NULL, IS_OBJECT TSRMLS_CC); }
-	|	expr T_IS_TYPE T_BOOL_CAST { zend_do_is_type(&$$, &$1, NULL, IS_BOOL TSRMLS_CC); }
-	|	expr T_IS_TYPE T_UNSET_CAST { zend_do_is_type(&$$, &$1, NULL, IS_NULL TSRMLS_CC); }
+	|	expr T_IS_CLASS is_class_expr { zend_do_is_class(&$$, &$1, &$3, 0 TSRMLS_CC); }
 	|	'(' expr ')' 	{ $$ = $2; }
 	|	expr '?' { zend_do_begin_qm_op(&$1, &$2 TSRMLS_CC); }
 		expr ':' { zend_do_qm_true(&$4, &$2, &$5 TSRMLS_CC); }
@@ -594,7 +587,7 @@ static_or_variable_string:
 	|	r_variable_without_static_member	{ $$ = $1; }
 ;
 
-is_type_expr:
+is_class_expr:
 		parse_class_entry T_STRING { do_fetch_class(&$$, &$1, &$2 TSRMLS_CC); }
 	|	T_STRING { do_fetch_class(&$$, NULL, &$1 TSRMLS_CC); }
 ;

Zend/zend_language_scanner.l

@@ -556,7 +556,7 @@ NEWLINE ("\r"|"\n"|"\r\n")
 }
 
 <ST_IN_SCRIPTING>"is" {
-	return T_IS_TYPE;
+	return T_IS_CLASS;
 }
 
 <ST_IN_SCRIPTING>"as" {

Zend/zend_operators.c

@@ -1358,57 +1358,18 @@ ZEND_API int is_smaller_or_equal_function(zval *result, zval *op1, zval *op2 TSR
 }
 
 
-ZEND_API int is_type_function(zval *result, zval *op1, zend_class_entry *class, int type TSRMLS_DC)
+ZEND_API int is_class_function(zval *result, zval *op1, zend_class_entry *class TSRMLS_DC)
 {
-	if (class) {
-		if (Z_TYPE_P(op1) == IS_OBJECT) {
-			zend_class_entry *ce;
-			for (ce = Z_OBJCE_P(op1); ce != NULL; ce = ce->parent) {
-				if (ce == class) {
-					ZVAL_BOOL(result, 1);
-					return SUCCESS;
-				}
+	if (Z_TYPE_P(op1) == IS_OBJECT) {
+		zend_class_entry *ce;
+		for (ce = Z_OBJCE_P(op1); ce != NULL; ce = ce->parent) {
+			if (ce == class) {
+				ZVAL_BOOL(result, 1);
+				return SUCCESS;
 			}
-			ZVAL_BOOL(result, 0);
-		} else {
-			ZVAL_BOOL(result, 0);
 		}
-		return SUCCESS;
-	}
-
-	switch (type) {
-		case IS_NULL:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_NULL);
-			break;
-
-		case IS_LONG:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_LONG);
-			break;
-
-		case IS_DOUBLE:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_DOUBLE);
-			break;
-
-		case IS_STRING:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_STRING);
-			break;
-
-		case IS_ARRAY:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_ARRAY);
-			break;
-
-		case IS_OBJECT:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_OBJECT);
-			break;
-
-		case IS_BOOL:
-			ZVAL_BOOL(result, Z_TYPE_P(op1) == IS_BOOL);
-			break;
-
-		default:
-			zend_error(E_ERROR, "Unknown operand type");
-			return FAILURE;
 	}
+	ZVAL_BOOL(result, 0);
 	return SUCCESS;
 }
 

Zend/zend_operators.h

@@ -58,7 +58,7 @@ ZEND_API int is_not_equal_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
 ZEND_API int is_smaller_function(zval *result, zval *op1, zval *op2 TSRMLS_DC);
 ZEND_API int is_smaller_or_equal_function(zval *result, zval *op1, zval *op2 TSRMLS_DC);
 
-ZEND_API int is_type_function(zval *result, zval *op1, zend_class_entry *ce, int type TSRMLS_DC);
+ZEND_API int is_class_function(zval *result, zval *op1, zend_class_entry *ce TSRMLS_DC);
 
 static inline zend_bool is_numeric_string(char *str, int length, long *lval, double *dval, zend_bool allow_errors)
 {