//replacement来自上个版本的加密替换function compress_func($match) {return strlen($match[0]).$match[0]{0};}function uncompress_func($match) {return str_repeat($match[2], $match[1]);}function compress($str) {$i = 0;$pattern = array();while(isset($replacement{$i})) array_push($pattern, "/".$replacement{$i++}."{2,}/");return preg_replace_callback($pattern, "compress_func", $str);}function uncompress($str) {return preg_replace_callback("/(d+)(w)/", "uncompress_func", $str);}?>复制代码下面再分享个awk实现字符串压缩的代码。
AWK,通用格式压缩字符串：#!/bin/awkfunction compress(str, _ARGVEND_, str_out, str_len, i, s, l) {str_out = "";str_len = length(str);s = "";l = 1;for(i =1; i if(substr(str, i, 1) == s) l++;else {if(s != "") {if(l > 1) str_out=str_out""lstr_out=str_out""s;}s = substr(str, i, 1);l = 1;}}return str_out;}function uncompress(str, _ARGVEND_, str_out, str_len, i, c) {str_out = "";str_len = length(str);for(i =1; i c = 0;while(substr(str, i, 1)~/[0-9]/) {c = c*10+substr(str, i, 1);i++;}if(c while(c--) str_out = str_out""substr(str, i, 1);}return str_out;}复制代码