@ 2014-08-14T05:44:14Z <?php
function gdr_encode($val) {
// all characters that json encode without escaping
$chrs = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 !#$%&\'()*+,-.:;<=>?@[]^_`{|}~';
$base = strlen($chrs);
$str = '';
while ($val > 0) {
$str = $chrs[$val % $base] . $str;
$val = (int)($val / $base);
}
return $str;
}
function gdr_decode($str) {
// all characters that json encode without escaping
$chrs = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 !#$%&\'()*+,-.:;<=>?@[]^_`{|}~';
$base = strlen($chrs);
$map = array();
for ($i=0; $i<$base; $i++) {
$map[$chrs[$i]] = $i;
}
$val = 0;
for ($i=0; $i<strlen($str); $i++) {
$val *= $base;
$val += (int)$map[$str[$i]];
}
return $val;
}
$vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 500000, 999999, 1000000, 4294967295, 4294967296);
foreach ($vals as $val) {
$enc = gdr_encode($val);
$dec = gdr_decode($enc);
if ($dec !== $val) {
echo "ERROR: $val => $enc => $dec\n";
} else {
echo sprintf("%2d %7s %10d\n", strlen($enc)+2-strlen($val), "\"$enc\"", $dec);}
}
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Output for 7.0.0 - 7.0.20 , 7.1.0 - 7.1.25 , 7.2.0 - 7.2.33 , 7.3.0 - 7.3.33 , 7.4.0 - 7.4.33 , 8.0.0 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.6 Fatal error: Uncaught Error: Call to undefined function strlen() in /in/YsJYp:38
Stack trace:
#0 {main}
thrown in /in/YsJYp on line 38
Process exited with code 255 . Output for 5.0.0 - 5.0.5 , 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 , 5.3.0 - 5.3.29 , 5.4.0 - 5.4.45 , 5.5.24 - 5.5.35 , 5.6.8 - 5.6.28 Fatal error: Call to undefined function strlen() in /in/YsJYp on line 38
Process exited with code 255 . Output for 4.4.5 - 4.4.9 Fatal error: Call to undefined function: strlen() in /in/YsJYp on line 38
Process exited with code 255 . Output for 4.3.2 - 4.3.11 , 4.4.0 - 4.4.4 Fatal error: Call to undefined function: strlen() in /in/YsJYp on line 38
Process exited with code 255 . Output for 4.3.0 - 4.3.1 Fatal error: Call to undefined function: strlen() in /in/YsJYp on line 38
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238.65 ms | 401 KiB | 326 Q