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run code in 300+ PHP versions simultaneously
<?php trait Test { public function test() { echo $this->test . "\n"; echo get_class($this) . "\n"; echo $this::class . "\n"; } } class Foo { private $test = "bar"; use Test; } (new Foo())->test();
Output for 8.1.23 - 8.1.27, 8.2.10 - 8.2.17, 8.3.0 - 8.3.4
bar Foo Foo
Output for 5.4.0 - 5.4.14
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/EahaR on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.24
Parse error: syntax error, unexpected T_STRING in /in/EahaR on line 3
Process exited with code 255.

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