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function num_to_sxg($n) {
$s = "";
$m = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ_abcdefghijkmnopqrstuvwxyz";
if ($n===undefined || $n===0) { return 0; }
while ($n>0) {
$d = $n % 60;
$s = strcat($m[$d],$s);
$n = ($n-$d)/60;
}
return $s;
}
function num_to_sxgf($n, $f) {
$s = num_to_sxg($n);
if ($f===undefined) {
$f=1;
}
$f -= strlen($s);
while ($f > 0) {
$s = strcat("0",$s);
--$f;
}
return $s;
}
function sxg_to_num($s) {
$n = 0;
$j = strlen($s);
for ($i=0;$i<$j;$i++) { // iterate from first to last char of $s
$c = ord($s[$i]); // put current ASCII of char into $c
if ($c>=48 && $c<=57) { $c=$c-48; }
else if ($c>=65 && $c<=72) { $c-=55; }
else if ($c==73 || $c==108) { $c=1; } // typo capital I, lowercase l to 1
else if ($c>=74 && $c<=78) { $c-=56; }
else if ($c==79) { $c=0; } // error correct typo capital O to 0
else if ($c>=80 && $c<=90) { $c-=57; }
else if ($c==95) { $c=34; } // underscore
else if ($c>=97 && $c<=107) { $c-=62; }
else if ($c>=109 && $c<=122) { $c-=63; }
else { $c = 0; } // treat all other noise as 0
$n = 60*$n + $c;
}
return $n;
}
Угадайте, какой это язык и что пил автор.
http://ideone.com/87cVrr
http://ideone.com/Z8j7ve
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