3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function gdr_encode($val) { $bin = ''; while ($val > 0) { $bin .= chr($val & 0xFF); $val >>= 8; } return str_replace(array('/', '='), array('_', ''), base64_encode($bin)); } function gdr_decode($str) { $bin = base64_decode(str_replace('_', '/', $str)); $val = 0; for ($i=strlen($bin)-1; $i>=0; $i--) { $val |= ord($bin[$i]) << $i*8; } return $val; } if (!function_exists('json_encode')) { die('json_encode missing'); } $vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 999999, 1000000, 4294967295, 4294967296); foreach ($vals as $val) { $enc = json_encode(gdr_encode($val)); $dec = json_encode(gdr_decode($enc)); $val = json_encode($val); echo "$enc $val\n"; }
based on Pkldg
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined function  json_encode() in /in/svBAq:26 Stack trace: #0 {main} thrown in /in/svBAq on line 26
Process exited with code 255.
Output for 5.2.0 - 5.6.28
Fatal error: Call to undefined function  json_encode() in /in/svBAq on line 26
Process exited with code 255.
Output for 4.3.0 - 5.1.6
json_encode missing