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<?php class Foo {}; class Bar extends Foo {}; function testClass($class=Foo::class) { $reflection = new ReflectionClass($class); return $class->isSubclassOf(Foo::class); } var_dump(testClass(), testClass(Bar::class));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to a member function isSubclassOf() on string in /in/TuAhe:9 Stack trace: #0 /in/TuAhe(12): testClass() #1 {main} thrown in /in/TuAhe on line 9
Process exited with code 255.
Output for 5.6.7 - 5.6.21
Fatal error: Call to a member function isSubclassOf() on string in /in/TuAhe on line 9
Process exited with code 255.
Output for 5.5.24 - 5.5.35
Fatal error: Call to a member function isSubclassOf() on a non-object in /in/TuAhe on line 9
Process exited with code 255.
Output for 5.4.2 - 5.4.45
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) in /in/TuAhe on line 6
Process exited with code 255.
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