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run code in 300+ PHP versions simultaneously
<?php $string = '1234 6514 1254 0014'; $string = md5($string); preg_match('/\d+?/', $string, $matches); echo substr($matches[0], 0, 1); printr_r($matches);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 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
2 Fatal error: Uncaught Error: Call to undefined function printr_r() in /in/be7qJ:9 Stack trace: #0 {main} thrown in /in/be7qJ on line 9
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
2 Fatal error: Call to undefined function printr_r() in /in/be7qJ on line 9
Process exited with code 255.
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171.32 ms | 402 KiB | 198 Q