PHP base62编码解码实现
1 <?php 2 /** 3 * @desc base62编码解码实现 4 * @param String $data 5 * @author Space 6 * @date 2014/8/6 7 **/ 8 9 function base62_encode($data){ 10 $base62str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; 11 $data = strval($data); 12 $base62 = str_split($base62str); 13 $len = strlen($data); 14 $i = 0; 15 $tmpArr = array(); 16 while($i<$len){ 17 $val = $data[$i]; 18 $tmp = str_pad(decbin(ord($data[$i])),8,'0',STR_PAD_LEFT ); 19 $temp = str_split($tmp,4); 20 $tmpArr = array_merge($tmpArr,$temp); 21 ++$i; 22 } 23 $result = ''; 24 $i = 0; 25 foreach($tmpArr as $arr){ 26 $temp = bindec($arr)*4+$i%2; 27 $result .= $base62[$temp]; 28 ++$i; 29 } 30 return $result; 31 } 32 33 function base62_decode($data){ 34 $base62str = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; 35 $data = strval($data); 36 $base62 = str_split($base62str); 37 $base62Arr = array_flip($base62); 38 if(!preg_match('/[a-zA-Z0-9]+/',$data)){ 39 return false; 40 } 41 $len = strlen($data); 42 $i = 0; 43 $tempArr = array(); 44 while($i<$len){ 45 $temp = decbin(($base62Arr[$data[$i]]-$i%2)/4); 46 $tempArr[] = str_pad($temp,4,'0',STR_PAD_LEFT); 47 ++$i; 48 } 49 $result = ''; 50 $tempArr = array_chunk($tempArr,2); 51 foreach($tempArr as $arr){ 52 $result .= chr(bindec(join('',$arr))); 53 } 54 return $result; 55 }
还可以根据需要$base62str变量中字符随机排序下，相当于一个简易的加密，不过意义不大。
