3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface Thing { } class Foo implements Thing { } class Bar extends Foo { } class Zulu { } var_dump( is_subclass_of('Foo', 'Thing'), is_a('Foo', 'Thing', TRUE), is_subclass_of('Bar', 'Thing'), is_a('Bar', 'Thing', TRUE), is_subclass_of('Zulu', 'Thing'), is_a('Zulu', 'Thing', TRUE), is_subclass_of('Foo', 'Foo'), is_a('Foo', 'Foo', TRUE), );
Output for 7.3.16 - 7.3.33, 7.4.3 - 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
bool(true) bool(true) bool(true) bool(true) bool(false) bool(false) bool(false) bool(true)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28, 5.4.0 - 5.4.27, 7.2.29 - 7.2.33
Parse error: syntax error, unexpected ')' in /in/AeSbS on line 20
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ')' in /in/AeSbS on line 20
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/AeSbS on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/AeSbS on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AeSbS on line 2
Process exited with code 255.
preferences:
210.84 ms | 401 KiB | 250 Q