3v4l.org

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 $str; } function gdr_decode($val) { return base_convert(strval($val), 16, 10); } $vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 999999, 1000000, 4294967295, 4294967296); foreach ($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 Nd5k8
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
"" 0 WORSE "B" 1 WORSE "jB" 99 WORSE "kB" 100 WORSE "=D" 255 WORSE "AE" 256 WORSE "nP" 999 WORSE "oP" 1000 EQUAL "PcC" 9999 WORSE "QcC" 10000 EQUAL "==P" 65535 EQUAL "AAQ" 65536 EQUAL "faY" 99999 EQUAL "gaY" 100000 "=I0D" 999999 EQUAL "AJ0D" 1000000 "=====D" 4294967295 "AAAAAE" 4294967296
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/3PWVP on line 20
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/3PWVP on line 20
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/3PWVP on line 20
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/3PWVP on line 20