3v4l.org

run code in 500+ PHP versions simultaneously
<?php class ClassA extends \stdClass {} class ClassB extends \stdClass {} class ClassC extends ClassB {} class ClassD extends ClassA {} function getSomeClass(): string { return 'ClassA'; } var_dump(new (getSomeClass())); var_dump(new ('Class' . 'B')); var_dump(new ('Class' . 'C')); var_dump(new (ClassD::class));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
object(ClassA)#1 (0) { } object(ClassB)#1 (0) { } object(ClassC)#1 (0) { } object(ClassD)#1 (0) { }
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected '(' in /in/pILGT on line 13
Process exited with code 255.

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