PHP BASE62 encoding and decoding implementation

1<?PHP2 /**3 * @desc BASE62 encoding and decoding implementation4 * @param String $data5 * @author Space6 * @date 2014/8/67 **/8 9 functionBase62_encode ($data){Ten     $base 62str= ' 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '; One     $data=Strval($data); A     $base=Str_split($base 62str); -     $len=strlen($data); -     $i= 0; the     $TMPARR=Array(); -      while($i<$len){ -         $val=$data[$i]; -         $tmp=Str_pad(Decbin(Ord($data[$i]), 8, ' 0 ',str_pad_left); +         $temp=Str_split($tmp, 4); -         $TMPARR=Array_merge($TMPARR,$temp); +++$i; A     } at     $result= ' '; -     $i= 0; -     foreach($TMPARR  as $arr){ -         $temp=Bindec($arr) *4+$i%; -         $result.=$base[$temp]; -++$i; in     } -     return $result; to } +  - functionBase62_decode ($data){ the     $base 62str= ' 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ '; *     $data=Strval($data); $     $base=Str_split($base 62str);Panax Notoginseng     $base 62ARR=Array_flip($base); -     if(!Preg_match('/[a-za-z0-9]+/',$data)){ the         return false; +     } A     $len=strlen($data); the     $i= 0; +     $TEMPARR=Array(); -      while($i<$len){ $         $temp=Decbin(($base 62ARR[$data[$i]]-$i%2)/4); $         $TEMPARR[] =Str_pad($temp, 4, ' 0 ',str_pad_left); -++$i; -     } the     $result= ' '; -     $TEMPARR=Array_chunk($TEMPARR, 2);Wuyi     foreach($TEMPARR  as $arr){ the         $result.=CHR(Bindec(Join(‘‘,$arr))); -     } Wu     return $result; -}

It is also possible to $base62str a variable in random order according to the need, which is equivalent to a simple encryption, but it has little meaning.

PHP BASE62 encoding and decoding implementation