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run code in 150+ php & hhvm versions
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<?PHP if (!function_exists('str_split')) { function str_split($s) { $r = array(); for ($i=0;$i<=strlen($s);$i++) { $r[] = substr($s, $i, 1); } return $r; } } function inc_uuid($uuid) { $n = ''; $c = 0; foreach (str_split(strrev($uuid)) as $s) { $c++; $s++; if ($s === 'aa') { $n = 'a'.$n; continue; } elseif ($s === 10) { $n .= 'a'; continue; } else { $n = $s.$n; break; } } $x = implode(array_slice(str_split($uuid), 0, strlen($uuid-$c)+1)); $n = $x.$n; return $n; } function get_uuid() { global $__uuid; if ($__uuid == NULL) { return '0a000000'; } else return inc_uuid($__uuid); } echo inc_uuid('a2b9'); ?>
Output for 7.1.0
Warning: A non-numeric value encountered in /in/HAmF0 on line 31 a2bca
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.0.14
a2bca