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<?php $n = 12; echo base64_encode(strong_random_bytes(intval(ceil($n * 3 / 4)))); echo substr(str_replace(['/', '+', '='], ['', '', ''], base64_encode(strong_random_bytes($n))), 0, $n);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
Fatal error: Uncaught Error: Call to undefined function strong_random_bytes() in /in/BFMLW:5 Stack trace: #0 {main} thrown in /in/BFMLW on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call to undefined function strong_random_bytes() in /in/BFMLW on line 5
Process exited with code 255.

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