PHP short URL

Two PHP code to implement the short URL function... two methods are provided here

Two PHP codes,
Implement the short URL function ..
Two methods are provided here.
Method 1

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Functionshorturl ($ input) {$ base62 = array ('A', 'B', 'C', 'D', 'e', 'e', 'F', 'G ', 'H', 'I', 'J', 'K', 'L', 'M', 'n', 'O', 'P', 'Q ', 'R', 'S', 'T', 'u', 'V', 'W', 'X', 'y', 'z', 'A ', 'B', 'C', 'D', 'e', 'F', 'G', 'H', 'I', 'J', 'K ', 'L', 'M', 'n', 'O', 'P', 'Q', 'R', 'S', 'T', 'u ', 'V', 'W', 'X', 'y', 'z', '0', '1', '2', '3', '4 ', '5', '6', '7', '8', '9'); $ hex = md5 ($ input); $ hexLen = strlen ($ hex ); $ subHexLen = $ hexLen/8; $ output = array (); for ($ I = 0; $ I <$ subHexLen; $ I ++) {$ subHex = substr ($ hex, $ I * 8, 8); $ int = 0x3FFFFFFF & (1 * ('0x '. $ subHex); $ out = ''; for ($ j = 0; $ j <6; $ j ++) {$ val = 0x0000003D & $ int; $ out. = $ base62 [$ val]; $ int = $ int> 5;} $ output [] = $ out;} return $ output;} $ ret = signed URL (' http://www.imsiren.com '); Print_r ($ ret );

Method 2:

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Functionbase62 ($ x) {$ show = ''; while ($ x> 0) {$ s = $ x % 62; if ($ s> 35) {$ s = chr ($ s + 61);} elseif ($ s> 9 & $ s <= 35) {$ s = chr ($ s + 55 );} $ show. = $ s; $ x = floor ($ x/62);} return $ show;} functionurlShort ($ url) {$ url = crc32 ($ url ); $ res = sprintf ('% u', $ url); returnbase62 ($ res);} echourlShort ("http://www.imsiren.com ");

Method 2: The performance is higher than the crc32 algorithm...
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