Online PHP editor | perf for d5ao2

<?php function gen_secured_random() { // cause random is the way $a = rand(1337,2600)*42; $b = rand(1879,1955)*42; $a < $b ? $a ^= $b ^= $a ^= $b : $a = $b; return $a+$b; } function secured_hash_function($plain) { // cause md5 is the best hash ever $secured_plain = sanitize_user_input($plain); return md5($secured_plain); } function sanitize_user_input($input) { // cause someone told me to never trust user input $re = '/[^a-zA-Z0-9]/'; $secured_input = preg_replace($re, "", $input); return $secured_input; } $s = 's'; $h ='h'; print "s => "; var_dump($s); print "h => "; var_dump($h); if (isset($s) && isset($h )) { $s = sanitize_user_input($s); $h = secured_hash_function($h); $r = gen_secured_random(); echo "strans => " ; var_dump($s); echo "htrans => " ; var_dump($h); echo "rtrans => " ; var_dump($r); if($s != false && $h != false) { if($s.$r == $h) { print "Well done! Here is your flag: "; } else { print "Fail..."; } } else { print "<p>Hum ...</p>"; } } ?>

Version	System time (s)	User time (s)	Memory (MiB)
7.2.2	0.003	0.011	19.94
7.2.1	0.003	0.012	19.89
7.2.0	0.011	0.004	19.80
7.1.14	0.000	0.017	18.95
7.1.13	0.003	0.013	18.99
7.1.12	0.011	0.004	18.86
7.1.11	0.003	0.014	18.55
7.1.10	0.006	0.012	18.18
7.1.9	0.006	0.006	18.37
7.1.8	0.003	0.010	18.17
7.1.7	0.004	0.008	17.29
7.1.6	0.016	0.010	35.50
7.1.5	0.018	0.006	34.84
7.1.4	0.013	0.013	34.61
7.1.3	0.019	0.016	34.69
7.1.2	0.013	0.013	34.70
7.1.1	0.000	0.012	16.71
7.1.0	0.009	0.003	17.02