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run code in 300+ PHP versions simultaneously
<?php // Error! class Test { public function foo() { $file = '/tmp/bar'; touch($file); $files = [ realpath($file) ]; var_dump($files); return array_unique($files); } } var_dump((new Test())->foo());
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(1) { [0]=> string(8) "/tmp/bar" } array(1) { [0]=> string(8) "/tmp/bar" }

preferences:
215.67 ms | 403 KiB | 296 Q