Remove automatic call to __toString() since it is supposed to cause too

much trouble. See discussion on the mailing list.

Zend/zend_object_handlers.c

@@ -884,35 +884,6 @@ int zend_std_object_get_class_name(zval *object, char **class_name, zend_uint *c
 
 int zend_std_cast_object(zval *readobj, zval *writeobj, int type, int should_free TSRMLS_DC)
 {
-	zval fname, *retval;
-	int is_ref, refcount;
-
-	switch (type) {
-	case IS_STRING:
-		ZVAL_STRING(&fname, "__tostring", 0);
-		if (call_user_function_ex(NULL, &readobj, &fname, &retval, 0, NULL, 0, NULL TSRMLS_CC) == SUCCESS) {
-			if (retval) {
-				if (Z_TYPE_P(retval) != IS_STRING) {
-					zend_error(E_ERROR, "Method %s::__toString() must return a string value", Z_OBJCE_P(readobj)->name);
-				}
-			} else {
-				MAKE_STD_ZVAL(retval);
-				ZVAL_STRINGL(retval, empty_string, 0, 0);
-			}
-			zval_dtor(writeobj);
-			is_ref = writeobj->is_ref;
-			refcount = writeobj->refcount;
-			*writeobj = *retval;
-			zval_copy_ctor(writeobj);
-			writeobj->is_ref = is_ref;
-			writeobj->refcount = refcount;
-			zval_ptr_dtor(&retval);
-			return SUCCESS;
-		}
-		break;
-	default:
-		break;
-	}
 	return FAILURE;
 }