php 编码转换程序代码

我们来看看用php写的一款编码转换程序代码哦，把gbk,utf-8之间互转等。

function phpUnescape_no($source) {
    $decodedStr = "";
    $pos = 0;
    $len = strlen ($source);
    while ($pos         $charAt = substr ($source, $pos, 1);
        if ($charAt == '%') {
            $pos++;
            $charAt = substr ($source, $pos, 1);
            if ($charAt == 'u') {
                // we got a unicode character
                $pos++;
                $unicodeHexVal = substr ($source, $pos, 4);
                $unicode = hexdec ($unicodeHexVal);
                $entity = "". $unicode . ';';
                $decodedStr .= utf8_encode ($entity);
                $pos += 4;
            }
            else {
                // we have an escaped ascii character
                $hexVal = substr ($source, $pos, 2);
                $decodedStr .= chr (hexdec ($hexVal));
                $pos += 2;
            }
        } else {
            $decodedStr .= $charAt;
            $pos++;
        }
    }
    return $decodedStr;
}

//////////////////////////////////////////////////////////////////////

function phpUnescape($escstr){
  preg_match_all("/%u[0-9A-Za-z]{4}|%.{2}|*|[0-9a-zA-Z.+-_]+/",$escstr,$matches); //prt($matches);
  $ar = &$matches[0];
  $c = "";
  foreach($ar as $val){
  if (substr($val,0,1)!="%") { //如果是字母数字+-_.的ascii码
      $c .=$val;
  }
  elseif (substr($val,1,1)!="u") { //如果是非字母数字+-_.的ascii码
    $x = hexdec(substr($val,1,2));
      $c .=chr($x);
  }
  else { //如果是大于0xFF的码
    $val = intval(substr($val,2),16);
    if($val       $c .= chr($val);
    }elseif($val       $c .= chr(0xC0 | ($val / 64));
      $c .= chr(0x80 | ($val % 64));
    }else{                // 0800-FFFF
       $c .= chr(0xE0 | (($val / 64) / 64));
       $c .= chr(0x80 | (($val / 64) % 64));
       $c .= chr(0x80 | ($val % 64));
     }
  }
  }
  return UTFtoGBK($c);
}

function UTFtoGBK($CS){
 $CodeObj = new Chinese("UTF8","GBK");
 return $CodeObj ->Convert($CS);
}

function phpEscape($str){
 $returnStr = "";
 if (@function_exists('mb_convert_encoding')){
  $returnStr = phpEscape_yes($str);
 }
 else{
  $returnStr = phpEscape_no($str);
 }
 return $returnStr;
}

function phpEscape_yes($string, $encoding = 'GBK') {
  $return = '';

  for ($x = 0; $x     $str = mb_substr($string, $x, 1, $encoding);
    if (strlen($str) > 1) {
      $return .= '%u' . strtoupper(bin2hex(mb_convert_encoding($str, 'UCS-2', $encoding)));
    } else {
      $return .= '%' . strtoupper(bin2hex($str));
    }
  }
  return $return;
}

function phpEscape_no($str){
    preg_match_all("/[x80-xff].|[x01-x7f]+/",$str,$newstr);
    $ar = $newstr[0];
    foreach($ar as $k=>$v){
        if(ord($ar[$k])>=127){
   $tmpString=bin2hex(GBKtoUCS2($v));
            if (!eregi("WIN",PHP_OS)){
                $tmpString = substr($tmpString,2,2).substr($tmpString,0,2);
            }
            $reString.="%u".$tmpString;
        } else {
            $reString.= rawurlencode($v);
        }
    }
    return $reString;
}

function GBKtoUCS2($CS){
 $CodeObj = new Chinese("GBK","UTF8");
 return utf8ToUnicode($CodeObj ->Convert($CS));
}

function utf8ToUnicode($str,$order="big")
{
  $ucs2string ="";
    $n=strlen($str);
    for ($i=0;$i  $v = $str[$i];
  $ord = ord($v);
  if( $ord     if ($order=="little") {
       $ucs2string .= $v.chr(0);
   }
   else {
       $ucs2string .= chr(0).$v;
   }
  }
  elseif ($ord=0x80) {  //110xxxxx 10xxxxxx
   $a = (ord($str[$i]) & 0x3F )   $b =  ord($str[$i+1]) & 0x3F ;
   $ucsCode = dechex($a+$b);   //echot($ucsCode);
   $h = intval(substr($ucsCode,0,2),16);
   $l  =  intval(substr($ucsCode,2,2),16);
   if ($order=="little") {
       $ucs2string   .= chr($l).chr($h);
   }
   else {
        $ucs2string   .= chr($h).chr($l);
   }
   $i++;
  }elseif ($ord=0x80  && ord($str[$i+2])>=0x80) { //1110xxxx 10xxxxxx 10xxxxxx
      $a = (ord($str[$i]) & 0x1F)   $b = (ord($str[$i+1]) & 0x3F )   $c =  ord($str[$i+2]) & 0x3F ;
   $ucsCode = dechex($a+$b+$c);   //echot($ucsCode);
   $h = intval(substr($ucsCode,0,2),16);
   $l  =  intval(substr($ucsCode,2,2),16);
   if ($order=="little") {
       $ucs2string   .= chr($l).chr($h);
   }
   else {
        $ucs2string   .= chr($h).chr($l);
   }  
   $i +=2;
  }
    }
 return $ucs2string;  
}

////////////////////////////////////////////////////////

function unescapeFuncMake($Txt){
 if ($Txt[2]!="*") return $Txt;
 $ETxt = "";
    $MTxt = "egy+nb@QwXvCWjKPRxVzDl/h7EOMtSa9f6*FpNr81i_0kqdG2LBcuZIAJYo34m-sT%5.UH3SYZ0hzt/[email protected]+oIR8GPVg9wbm%xJvKLWrn*F4HAe-QladM27Uc5_";
 $TTxtnum = substr($Txt,0,2);
 $TTxt = substr((substr($MTxt,70).substr($MTxt,70)),$TTxtnum);
 for ($ii=3; $ii  $w = ($ii-3)%10;
  $k = strpos($TTxt,$Txt[$ii],$w)-$w;
  $ETxt .= $MTxt[$k];
 }
 return phpUnescape($ETxt);
}

function escapeFuncMake($Txt){
 if ($Txt=="" || $Txt[2]=="*") return $Txt;
 $MTxt = "egy+nb@QwXvCWjKPRxVzDl/h7EOMtSa9f6*FpNr81i_0kqdG2LBcuZIAJYo34m-sT%5.UH3SYZ0hzt/[email protected]+oIR8GPVg9wbm%xJvKLWrn*F4HAe-QladM27Uc5_";
 $BTxt = phpEscape($Txt);
 $TTxt = floor(mt_rand(0,50));
 $ETxt = $TTxt.($TTxt>9?"*":"**");
 for ($ii=0; $ii  $k = strpos($MTxt,$BTxt[$ii])+($ii%10);
  $ETxtstr = substr((substr($MTxt,70).substr($MTxt,70)),$TTxt);
  $ETxt .= $ETxtstr[$k];
 }
 return $ETxt;
}