PHP-php如何将包含汉字的URL转为字母或数字？
像很多搜索的网站当用户搜索中文时如果Get一般URL都包含中文，这样有可能造成编码有问题，而且对用户来说URL不友好，我目前是采用urlencode处理，但是这样不仅URL很长，而且%xx的形式也很不好看。
我发现像www.smarter.com.cn的网站，它们的搜索就是这亲的，当搜索“苹果”时，url转换成了“_mgllljpl-se”，这样URL就很友好，请问是如何实现的，后台数据库又是如何设计的？
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研究了一下，看这个js文件http://files.smarter.com.cn/jscripts/default/urldecode.js?80，它是用base64decode进行编码处理。
function redirectLink(url, link) { var _url = base64decode(url); link.setAttribute('href', _url); return false; } function modifyLink(url){ url = base64decode(url); window.location.href=url; return false; } function base64decode(str) { var c1, c2, c3, c4; var i, len, out; len = str.length; i = 0; out = ""; while(i < len) { /* c1 */ do { c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff]; } while(i < len && c1 == -1); if(c1 == -1) break; /* c2 */ do { c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff]; } while(i < len && c2 == -1); if(c2 == -1) break; out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4)); /* c3 */ do { c3 = str.charCodeAt(i++) & 0xff; if(c3 == 61) return out; c3 = base64DecodeChars[c3]; } while(i < len && c3 == -1); if(c3 == -1) break; out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2)); /* c4 */ do { c4 = str.charCodeAt(i++) & 0xff; if(c4 == 61) return out; c4 = base64DecodeChars[c4]; } while(i < len && c4 == -1); if(c4 == -1) break; out += String.fromCharCode(((c3 & 0x03) << 6) | c4); } return out; }**其实加密后还是不够友好，因为你的连接和内容会有很大的差异，建议：
1，首先检测关键字为汉字的url、
2，调用拼音类直接转换为拼音
比如：http://test.test.com/汉字.html转换为http://test.test.com/hanzi.html
这样即达到无中文的效果，而且搜索引擎也很喜欢这样的，现在很多站都是这样做的
希望你可以参考一下**
在补充一下，因为笔者说要将汉字转为字母，汉字的拼音本身就是字母，所以提供我用的转拼音转换方法
下面是一个你可以用的着的汉字转拼音类（注意：这个只是我用到的汉字转拼音的方法）
<?php
function Pinyin($_String, $_Code='UTF8'){ //GBK页面可改为gb2312，其他随意填写为UTF8
$_DataKey = "a|ai|an|ang|ao|ba|bai|ban|bang|bao|bei|ben|beng|bi|bian|biao|bie|bin|bing|bo|bu|ca|cai|can|cang|cao|ce|ceng|cha".
"|chai|chan|chang|chao|che|chen|cheng|chi|chong|chou|chu|chuai|chuan|chuang|chui|chun|chuo|ci|cong|cou|cu|".
"cuan|cui|cun|cuo|da|dai|dan|dang|dao|de|deng|di|dian|diao|die|ding|diu|dong|dou|du|duan|dui|dun|duo|e|en|er".
"|fa|fan|fang|fei|fen|feng|fo|fou|fu|ga|gai|gan|gang|gao|ge|gei|gen|geng|gong|gou|gu|gua|guai|guan|guang|gui".
"|gun|guo|ha|hai|han|hang|hao|he|hei|hen|heng|hong|hou|hu|hua|huai|huan|huang|hui|hun|huo|ji|jia|jian|jiang".
"|jiao|jie|jin|jing|jiong|jiu|ju|juan|jue|jun|ka|kai|kan|kang|kao|ke|ken|keng|kong|kou|ku|kua|kuai|kuan|kuang".
"|kui|kun|kuo|la|lai|lan|lang|lao|le|lei|leng|li|lia|lian|liang|liao|lie|lin|ling|liu|long|lou|lu|lv|luan|lue".
"|lun|luo|ma|mai|man|mang|mao|me|mei|men|meng|mi|mian|miao|mie|min|ming|miu|mo|mou|mu|na|nai|nan|nang|nao|ne".
"|nei|nen|neng|ni|nian|niang|niao|nie|nin|ning|niu|nong|nu|nv|nuan|nue|nuo|o|ou|pa|pai|pan|pang|pao|pei|pen".
"|peng|pi|pian|piao|pie|pin|ping|po|pu|qi|qia|qian|qiang|qiao|qie|qin|qing|qiong|qiu|qu|quan|que|qun|ran|rang".
"|rao|re|ren|reng|ri|rong|rou|ru|ruan|rui|run|ruo|sa|sai|san|sang|sao|se|sen|seng|sha|shai|shan|shang|shao|".
"she|shen|sheng|shi|shou|shu|shua|shuai|shuan|shuang|shui|shun|shuo|si|song|sou|su|suan|sui|sun|suo|ta|tai|".
"tan|tang|tao|te|teng|ti|tian|tiao|tie|ting|tong|tou|tu|tuan|tui|tun|tuo|wa|wai|wan|wang|wei|wen|weng|wo|wu".
"|xi|xia|xian|xiang|xiao|xie|xin|xing|xiong|xiu|xu|xuan|xue|xun|ya|yan|yang|yao|ye|yi|yin|ying|yo|yong|you".
"|yu|yuan|yue|yun|za|zai|zan|zang|zao|ze|zei|zen|zeng|zha|zhai|zhan|zhang|zhao|zhe|zhen|zheng|zhi|zhong|".
"zhou|zhu|zhua|zhuai|zhuan|zhuang|zhui|zhun|zhuo|zi|zong|zou|zu|zuan|zui|zun|zuo";
$_DataValue = "-20319|-20317|-20304|-20295|-20292|-20283|-20265|-20257|-20242|-20230|-20051|-20036|-20032|-20026|-20002|-19990".
"|-19986|-19982|-19976|-19805|-19784|-19775|-19774|-19763|-19756|-19751|-19746|-19741|-19739|-19728|-19725".
"|-19715|-19540|-19531|-19525|-19515|-19500|-19484|-19479|-19467|-19289|-19288|-19281|-19275|-19270|-19263".
"|-19261|-19249|-19243|-19242|-19238|-19235|-19227|-19224|-19218|-19212|-19038|-19023|-19018|-19006|-19003".
"|-18996|-18977|-18961|-18952|-18783|-18774|-18773|-18763|-18756|-18741|-18735|-18731|-18722|-18710|-18697".
"|-18696|-18526|-18518|-18501|-18490|-18478|-18463|-18448|-18447|-18446|-18239|-18237|-18231|-18220|-18211".
"|-18201|-18184|-18183|-18181|-18012|-17997|-17988|-17970|-17964|-17961|-17950|-17947|-17931|-17928|-17922".
"|-17759|-17752|-17733|-17730|-17721|-17703|-17701|-17697|-17692|-17683|-17676|-17496|-17487|-17482|-17468".
"|-17454|-17433|-17427|-17417|-17202|-17185|-16983|-16970|-16942|-16915|-16733|-16708|-16706|-16689|-16664".
"|-16657|-16647|-16474|-16470|-16465|-16459|-16452|-16448|-16433|-16429|-16427|-16423|-16419|-16412|-16407".
"|-16403|-16401|-16393|-16220|-16216|-16212|-16205|-16202|-16187|-16180|-16171|-16169|-16158|-16155|-15959".
"|-15958|-15944|-15933|-15920|-15915|-15903|-15889|-15878|-15707|-15701|-15681|-15667|-15661|-15659|-15652".
"|-15640|-15631|-15625|-15454|-15448|-15436|-15435|-15419|-15416|-15408|-15394|-15385|-15377|-15375|-15369".
"|-15363|-15362|-15183|-15180|-15165|-15158|-15153|-15150|-15149|-15144|-15143|-15141|-15140|-15139|-15128".
"|-15121|-15119|-15117|-15110|-15109|-14941|-14937|-14933|-14930|-14929|-14928|-14926|-14922|-14921|-14914".
"|-14908|-14902|-14894|-14889|-14882|-14873|-14871|-14857|-14678|-14674|-14670|-14668|-14663|-14654|-14645".
"|-14630|-14594|-14429|-14407|-14399|-14384|-14379|-14368|-14355|-14353|-14345|-14170|-14159|-14151|-14149".
"|-14145|-14140|-14137|-14135|-14125|-14123|-14122|-14112|-14109|-14099|-14097|-14094|-14092|-14090|-14087".
"|-14083|-13917|-13914|-13910|-13907|-13906|-13905|-13896|-13894|-13878|-13870|-13859|-13847|-13831|-13658".
"|-13611|-13601|-13406|-13404|-13400|-13398|-13395|-13391|-13387|-13383|-13367|-13359|-13356|-13343|-13340".
"|-13329|-13326|-13318|-13147|-13138|-13120|-13107|-13096|-13095|-13091|-13076|-13068|-13063|-13060|-12888".
"|-12875|-12871|-12860|-12858|-12852|-12849|-12838|-12831|-12829|-12812|-12802|-12607|-12597|-12594|-12585".
"|-12556|-12359|-12346|-12320|-12300|-12120|-12099|-12089|-12074|-12067|-12058|-12039|-11867|-11861|-11847".
"|-11831|-11798|-11781|-11604|-11589|-11536|-11358|-11340|-11339|-11324|-11303|-11097|-11077|-11067|-11055".
"|-11052|-11045|-11041|-11038|-11024|-11020|-11019|-11018|-11014|-10838|-10832|-10815|-10800|-10790|-10780".
"|-10764|-10587|-10544|-10533|-10519|-10331|-10329|-10328|-10322|-10315|-10309|-10307|-10296|-10281|-10274".
"|-10270|-10262|-10260|-10256|-10254";
$_TDataKey = explode('|', $_DataKey);
$_TDataValue = explode('|', $_DataValue);
$_Data = array_combine($_TDataKey, $_TDataValue);
arsort($_Data);
reset($_Data);
if($_Code!= 'gb2312') $_String = _U2_Utf8_Gb($_String);
$_Res = '';
for($i=0; $i<strlen($_String); $i++) {
$_P = ord(substr($_String, $i, 1));
if($_P>160) {
$_Q = ord(substr($_String, ++$i, 1)); $_P = $_P*256 + $_Q - 65536;
}
$_Res .= _Pinyin($_P, $_Data);
}
return preg_replace("/[^a-z0-9]*/", '', $_Res);
}
function _Pinyin($_Num, $_Data){
if($_Num>0 && $_Num<160 ){
return chr($_Num);
}elseif($_Num<-20319 || $_Num>-10247){
return '';
}else{
foreach($_Data as $k=>$v){ if($v<=$_Num) break; }
return $k;
}
}
function _U2_Utf8_Gb($_C){
$_String = '';
if($_C < 0x80){
$_String .= $_C;
}elseif($_C < 0x800) {
$_String .= chr(0xC0 | $_C>>6);
$_String .= chr(0x80 | $_C & 0x3F);
}elseif($_C < 0x10000){
$_String .= chr(0xE0 | $_C>>12);
$_String .= chr(0x80 | $_C>>6 & 0x3F);
$_String .= chr(0x80 | $_C & 0x3F);
}elseif($_C < 0x200000) {
$_String .= chr(0xF0 | $_C>>18);
$_String .= chr(0x80 | $_C>>12 & 0x3F);
$_String .= chr(0x80 | $_C>>6 & 0x3F);
$_String .= chr(0x80 | $_C & 0x3F);
}
return iconv('UTF-8', 'GB2312', $_String);
}
//测试
echo Pinyin('中文字','gb2312'); //第二个参数“1”可随意设置即为utf8编码
?>
我用的是base64_encode（）；
当传一个参数时：
html代码：
<a href="list.php?pra=<?php echo base64_encode('参数');?>" target='_blank'>
<img src="images/home/page-new1212psd_17.jpg" />
</a>
list.php 页面:
$par = base64_decode($_GET['pra']);
当传多个参数时我们可以：
<a href="list.php?pra=<?php echo base64_encode('参数1，参数2，参数3');?>" target='_blank'>
<img src="images/home/page-new1212psd_17.jpg" />
</a>
list.php 页面:
$par = base64_decode($_GET['pra']);
$par_arr = explode(',',$par);
php加密解密代码如下：
<?php
function myEncode($str){
$arrReturn=array();
for($i=0;$i<strlen($str);++$i){
$a=dechex(ord($str{$i}));
for($j=0;$j<strlen($a);++$j){
$char=$a{$j};
if($char>='a'){//是字母
$arrReturn[]=chr(ord($char)+10);
}else{
//是数字
//0->a,1->b,2->c ,3->d
//即chr(ord($char)-ord('0')+ord('a')); //=chr(ord($char)-48+97)
//=chr(ord($char+49)
$arrReturn[]=chr(ord($char)+49);
}
}
}
return implode('',$arrReturn);
}
echo myEncode('苹果').'<br/>';//oiilljogjojm
function myDecode($str){
$chinese=array();
for($i=0;$i<strlen($str);$i+=2){
$arr=array();
for($j=0;$j<2;$j++){
$char=$str{$i+$j};
//107=ord('a')+10
$arr[]= ord($char)>=107 ? chr(ord($char)-10):chr(ord($char)-49);
}
$chinese[]= chr(hexdec($arr[0].$arr[1]));
}
return implode('',$chinese);
}
echo myDecode('oiilljogjojm');//苹果
?>
我觉得他们可能把用户搜索的中文建了一个库，它们会把用户搜索的汉字在url显示时替换成它们自定的一个字符串，在搜索数据时又会把它们自定义的字符串转换为对应的汉字。