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run code in 150+ php & hhvm versions
Bugs & Features
<?php function gdr_encode($val) { $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!='; $base = strlen($chars); $str = ''; while ($val > 0) { $str .= $chars[$val % $base]; $val = (int)($val / $base); } return $str; } function gdr_decode($str) { $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!='; $base = strlen($chars); $map = array(); for ($i=0; $i<$base; $i++) { $map[$chars[$i]] = $i; } //echo print_r($map, false) . "\n"; $val = 0; echo print_r(strlen($str), false) . "\n"; for ($i=0; $i<strlen($str); $i++) { $val *= $base; $char = $str[$i]; //echo "{$str[$i]}\n"; $val += (int)$map[$str[$i]]; } return $val; } //$vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 999999, 1000000, 4294967295, 4294967296); $vals = array(1); foreach ($vals as $val) { $enc = json_encode(gdr_encode($val)); $dec = json_encode(gdr_decode($enc)); $val = json_encode($val); if (strlen($enc) > strlen($val)) { echo "$enc $val WORSE\n"; } else if (strlen($enc) == strlen($val)) { echo "$enc $val EQUAL\n"; } else { echo "$enc $val\n"; } }
based on 0Z6m2
Output for 5.3.0 - 7.1.0
31 Notice: Undefined index: " in /in/I60Hm on line 28 Notice: Undefined index: " in /in/I60Hm on line 28 "B" 1 WORSE
Output for 5.2.0 - 5.2.17
31 Notice: Undefined index: " in /in/I60Hm on line 28 Notice: Undefined index: " in /in/I60Hm on line 28 "B" 1 WORSE
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/I60Hm on line 36
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/I60Hm on line 36
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/I60Hm on line 36
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/I60Hm on line 36