3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo { class A { public function hello() { echo __NAMESPACE__; } } } namespace Bar { class B extends \Foo\A { } $b = B; $b->hello(); }
Output for 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: Undefined constant "Bar\B" in /in/F0N3Q:20 Stack trace: #0 {main} thrown in /in/F0N3Q on line 20
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant B - assumed 'B' (this will throw an Error in a future version of PHP) in /in/F0N3Q on line 20 Fatal error: Uncaught Error: Call to a member function hello() on string in /in/F0N3Q:21 Stack trace: #0 {main} thrown in /in/F0N3Q on line 21
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25
Notice: Use of undefined constant B - assumed 'B' in /in/F0N3Q on line 20 Fatal error: Uncaught Error: Call to a member function hello() on string in /in/F0N3Q:21 Stack trace: #0 {main} thrown in /in/F0N3Q on line 21
Process exited with code 255.
Output for 5.6.0 - 5.6.28
Notice: Use of undefined constant B - assumed 'B' in /in/F0N3Q on line 20 Fatal error: Call to a member function hello() on string in /in/F0N3Q on line 21
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Notice: Use of undefined constant B - assumed 'B' in /in/F0N3Q on line 20 Fatal error: Call to a member function hello() on a non-object in /in/F0N3Q on line 21
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/F0N3Q on line 3
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/F0N3Q on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/F0N3Q on line 3
Process exited with code 255.

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