3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo { class Bar { public function baz() { return strlen('Regarding the overhead: Just keep in mind, that a typical application calls built-in functions many thousand times. Even if the difference is small: It exists.'); } } $start = microtime(true); $foo = new Foo\Bar; for($x = 0; $x < 1000000; $x++) { $foo->baz(); } echo "Time: " . round((microtime(true) - $start ) / 1000000, 5) . 's'; }
Output for 8.0.0 - 8.0.11
Fatal error: Uncaught Error: Class "Foo\Foo\Bar" not found in /in/u3Pm9:10 Stack trace: #0 {main} thrown in /in/u3Pm9 on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.30, 7.4.0 - 7.4.24
Fatal error: Uncaught Error: Class 'Foo\Foo\Bar' not found in /in/u3Pm9:10 Stack trace: #0 {main} thrown in /in/u3Pm9 on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Class 'Foo\Foo\Bar' not found in /in/u3Pm9 on line 10
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/u3Pm9 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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/u3Pm9 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/u3Pm9 on line 2
Process exited with code 255.
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196.65 ms | 401 KiB | 272 Q