Improve class inheritance error messages

Zend/tests/enum/final.phpt

@@ -9,4 +9,4 @@ class Bar extends Foo {}
 
 ?>
 --EXPECTF--
-Fatal error: Class Bar may not inherit from final class (Foo) in %s on line %d
+Fatal error: Class Bar cannot extend final class Foo in %s on line %d

Zend/tests/generators/errors/generator_extend_error.phpt

@@ -7,4 +7,4 @@ class ExtendedGenerator extends Generator { }
 
 ?>
 --EXPECTF--
-Fatal error: Class ExtendedGenerator may not inherit from final class (Generator) in %s on line %d
+Fatal error: Class ExtendedGenerator cannot extend final class Generator in %s on line %d

Zend/tests/traits/error_001.phpt

@@ -25,4 +25,4 @@ class A extends foo {
 
 ?>
 --EXPECTF--
-Fatal error: Class A cannot extend from trait foo in %s on line %d
+Fatal error: Class A cannot extend trait foo in %s on line %d

Zend/tests/traits/error_009.phpt

@@ -9,4 +9,4 @@ class foo extends abc { }
 
 ?>
 --EXPECTF--
-Fatal error: Class foo cannot extend from trait abc in %s on line %d
+Fatal error: Class foo cannot extend trait abc in %s on line %d

Zend/tests/weakrefs/weakrefs_004.phpt

@@ -5,4 +5,4 @@ WeakReference no inheritance
 class Test extends WeakReference {}
 ?>
 --EXPECTF--
-Fatal error: Class Test may not inherit from final class (WeakReference) in %s on line %d
+Fatal error: Class Test cannot extend final class WeakReference in %s on line %d

Zend/zend_inheritance.c

@@ -1424,19 +1424,19 @@ ZEND_API void zend_do_inheritance_ex(zend_class_entry *ce, zend_class_entry *par
 	if (UNEXPECTED(ce->ce_flags & ZEND_ACC_INTERFACE)) {
 		/* Interface can only inherit other interfaces */
 		if (UNEXPECTED(!(parent_ce->ce_flags & ZEND_ACC_INTERFACE))) {
-			zend_error_noreturn(E_COMPILE_ERROR, "Interface %s may not inherit from class (%s)", ZSTR_VAL(ce->name), ZSTR_VAL(parent_ce->name));
+			zend_error_noreturn(E_COMPILE_ERROR, "Interface %s cannot extend class %s", ZSTR_VAL(ce->name), ZSTR_VAL(parent_ce->name));
 		}
 	} else if (UNEXPECTED(parent_ce->ce_flags & (ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_FINAL))) {
-		/* Class declaration must not extend traits or interfaces */
-		if (parent_ce->ce_flags & ZEND_ACC_INTERFACE) {
-			zend_error_noreturn(E_COMPILE_ERROR, "Class %s cannot extend from interface %s", ZSTR_VAL(ce->name), ZSTR_VAL(parent_ce->name));
-		} else if (parent_ce->ce_flags & ZEND_ACC_TRAIT) {
-			zend_error_noreturn(E_COMPILE_ERROR, "Class %s cannot extend from trait %s", ZSTR_VAL(ce->name), ZSTR_VAL(parent_ce->name));
-		}
-
 		/* Class must not extend a final class */
 		if (parent_ce->ce_flags & ZEND_ACC_FINAL) {
-			zend_error_noreturn(E_COMPILE_ERROR, "Class %s may not inherit from final class (%s)", ZSTR_VAL(ce->name), ZSTR_VAL(parent_ce->name));
+			zend_error_noreturn(E_COMPILE_ERROR, "Class %s cannot extend final class %s", ZSTR_VAL(ce->name), ZSTR_VAL(parent_ce->name));
+		}
+
+		/* Class declaration must not extend traits or interfaces */
+		if ((parent_ce->ce_flags & ZEND_ACC_INTERFACE) || (parent_ce->ce_flags & ZEND_ACC_TRAIT)) {
+			zend_error_noreturn(E_COMPILE_ERROR, "Class %s cannot extend %s %s",
+				ZSTR_VAL(ce->name), parent_ce->ce_flags & ZEND_ACC_INTERFACE ? "interface" : "trait", ZSTR_VAL(parent_ce->name)
+			);
 		}
 	}
 

ext/imap/tests/imap_final.phpt

@@ -7,4 +7,4 @@ imap
 
 class T extends IMAP\Connection {}
 --EXPECTF--
-Fatal error: Class T may not inherit from final class (IMAP\Connection) in %s on line %d
+Fatal error: Class T cannot extend final class IMAP\Connection in %s on line %d

ext/reflection/tests/ReflectionAttribute_final.phpt

@@ -7,4 +7,4 @@ class T extends ReflectionAttribute {}
 
 ?>
 --EXPECTF--
-Fatal error: Class T may not inherit from final class (ReflectionAttribute) in %s on line %d
+Fatal error: Class T cannot extend final class ReflectionAttribute in %s on line %d

ext/standard/tests/class_object/bug78638.phpt

@@ -6,4 +6,4 @@ $c = new class('bar') extends __PHP_Incomplete_Class {
 };
 ?>
 --EXPECTF--
-Fatal error: Class __PHP_Incomplete_Class@anonymous may not inherit from final class (__PHP_Incomplete_Class) in %s on line %d
+Fatal error: Class __PHP_Incomplete_Class@anonymous cannot extend final class __PHP_Incomplete_Class in %s on line %d

ext/xml/tests/bug78563_final.phpt

@@ -12,4 +12,4 @@ class Dummy extends Xmlparser {
 ?>
 ===DONE===
 --EXPECTF--
-Fatal error: Class Dummy may not inherit from final class (XMLParser) in %s on line %d
+Fatal error: Class Dummy cannot extend final class XMLParser in %s on line %d

tests/classes/class_final.phpt

@@ -17,4 +17,4 @@ class derived extends base {
 echo "Done\n"; // shouldn't be displayed
 ?>
 --EXPECTF--
-Fatal error: Class derived may not inherit from final class (base) in %s on line %d
+Fatal error: Class derived cannot extend final class base in %s on line %d

tests/classes/interface_and_extends.phpt

@@ -21,4 +21,4 @@ $o->show();
 ?>
 ===DONE===
 --EXPECTF--
-Fatal error: Class Tester cannot extend from interface Test in %sinterface_and_extends.php on line %d
+Fatal error: Class Tester cannot extend interface Test in %sinterface_and_extends.php on line %d