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); if (strlen($enc) > strlen($val)) { echo "$enc $val FAIL: WORSE\n"; } else if (strlen($enc) == strlen($val)) { echo "$enc $val FAIL: EQUAL\n"; } else { echo "$enc $val\n"; } }
based on nrXhe
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
"" 0 FAIL: WORSE "AQ" 1 FAIL: WORSE "Yw" 99 FAIL: WORSE "ZA" 100 FAIL: WORSE "_w" 255 FAIL: WORSE "AAE" 256 FAIL: WORSE "5wM" 999 FAIL: WORSE "6AM" 1000 FAIL: WORSE "Dyc" 9999 FAIL: WORSE "ECc" 10000 FAIL: EQUAL "__8" 65535 FAIL: EQUAL "AAAB" 65536 FAIL: WORSE "n4YB" 99999 FAIL: WORSE "oIYB" 100000 FAIL: EQUAL "P0IP" 999999 FAIL: EQUAL "QEIP" 1000000 "_____w" 4294967295 "AAAAAAE" 4294967296
Output for 4.3.0 - 5.1.6
json_encode missing