PHP解密Unicode及Escape加密字符串


            本文给大家分享一个PHP解密Unicode及Escape加密字符串函数





<?php  

function uni_decode($s) {  

  preg_match_all('/\&\#([0-9]{2,5})\;/', $s, $html_uni);  

  preg_match_all('/[\\\%]u([0-9a-f]{4})/ie', $s, $js_uni);  

  $source = array_merge($html_uni[0], $js_uni[0]);  

  $js = array();  

  for($i=0;$i<count($js_uni[1]);$i++) {  

    $js[] = hexdec($js_uni[1][$i]);  

  }  

  $utf8 = array_merge($html_uni[1], $js);  

  $code = $s;  

  for($j=0;$j<count($utf8);$j++) {  

    $code = str_replace($source[$j], unicode2utf8($utf8[$j]), $code);  

  }  

  return $code;//$s;//preg_replace('/\\\u([0-9a-f]{4})/ie', "chr(hexdec('\\1'))", $s);  

}  

  

function unicode2utf8($c) {  

  $str="";  

  if ($c < 0x80) {  

     $str.=chr($c);  

  } else if ($c < 0x800) {  

     $str.=chr(0xc0 | $c>>6);  

     $str.=chr(0x80 | $c & 0x3f);  

  } else if ($c < 0x10000) {  

     $str.=chr(0xe0 | $c>>12);  

     $str.=chr(0x80 | $c>>6 & 0x3f);  

     $str.=chr(0x80 | $c & 0x3f);  

  } else if ($c < 0x200000) {  

     $str.=chr(0xf0 | $c>>18);  

     $str.=chr(0x80 | $c>>12 & 0x3f);  

     $str.=chr(0x80 | $c>>6 & 0x3f);  

     $str.=chr(0x80 | $c & 0x3f);  

  }  

  return $str;  

}  

  

$str='%u5927%u5BB6%u597D%uFF0C我是孤魂！<br />\u8FD9\u662F\u6D4B\u8BD5\u6587\u672C\uFF01';  

echo uni_decode($str); // 大家好，我是孤魂！这是测试文本！  





在网上搜索一把，很多用php实现的escape函数，大同小异





function phpescape($str){ 

  preg_match_all("/[\x80-\xff].|[\x01-\x7f]+/",$str,$newstr); 

  $ar = $newstr[0]; 

  foreach($ar as $k=>$v){ 

    if(ord($ar[$k])>=127){ 

      $tmpString=bin2hex(iconv("GBK","ucs-2",$v)); 

      if (!eregi("WIN",PHP_OS)){ 

        $tmpString = substr($tmpString,2,2).substr($tmpString,0,2); 

      } 

      $reString.="%u".$tmpString; 

    } else { 

      $reString.= rawurlencode($v); 

    } 

  } 

  return $reString; 

} 



以上所述就是本文的全部内容了，希望大家能够喜欢。