<?php
function gdr_encode($val) {
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!=';
$base = strlen($chars);
$str = '';
while ($val > 0) {
$str = $chars[$val % $base] . $str;$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;
}
$val = 0;
for ($i=0; $i<strlen($str); $i++) {
$val *= $base;
$val += (int)$map[$str[$i]];
}
return $val;
}
$vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 999999, 1000000, 1023410115, 4294967295, 4294967296);
foreach ($vals as $val) {
$enc = gdr_encode($val);
$dec = gdr_decode($enc);
if (strlen($enc)+2 > strlen($val)) {
echo "\"$enc\" $val WORSE\n";
} else if (strlen($enc)+2 == strlen($val)) {
echo "\"$enc\" $val EQUAL\n";
} else {
echo "\"$enc\" $val\n";
}
}
- Output for 5.4.0 - 5.4.31
- Parse error: syntax error, unexpected '$str' (T_VARIABLE) in /in/H2pbu on line 8
Process exited with code 255. - Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected T_VARIABLE in /in/H2pbu on line 8
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected T_VARIABLE in /in/H2pbu on line 8
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/H2pbu on line 8
Process exited with code 255.
preferences:
228.14 ms | 1395 KiB | 122 Q