PHP 网站SEO及过滤类的简单示例

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经测试代码如下：

/**
 * 网站SEO及过滤类
 *
 * @param 
 * @author 四海网 www.q1010.com
 **/
class SeoTools
{
    public function friendlyURL($string, $replacement = '-') {
        $map = array(
            '/à|á|å|â|ä/' => 'a',
            '/è|é|ê|ẽ|ë/' => 'e',
            '/ì|í|î/' => 'i',
            '/ò|ó|ô|ø/' => 'o',
            '/ù|ú|ů|û/' => 'u',
            '/ç|č/' => 'c',
            '/ñ|ň/' => 'n',
            '/ľ/' => 'l',
            '/ý/' => 'y',
            '/ť/' => 't',
            '/ž/' => 'z',
            '/š/' => 's',
            '/æ/' => 'ae',
            '/ö/' => 'oe',
            '/ü/' => 'ue',
            '/Ä/' => 'Ae',
            '/Ü/' => 'Ue',
            '/Ö/' => 'Oe',
            '/ß/' => 'ss',
         '/ /'=>' ',
         '/　/'=>'',
         '/～|·|！|@|#|￥|%|…|&|×|（|）|-|\+|=|『|【|』|】|、|:|；|“|”|\'|《|，|》|。|？|\/|—|_|：|√|＜|°|丶|＞|－|★|｜|│|‖|ˇ/'=>' ',
          '/[^\w\s\x80-\xff]/' => ' ',
            '/\\s+/' => $replacement
        );
        $string = trim($string);
        $string = preg_replace(array_keys($map), array_values($map), $string);
        $string = preg_replace('/\\s+/',$replacement, strtolower($string));
        $string = trim($string,$replacement);
        return $string;
    }
    
    //判断email
 public function isEmail($mailAddr)
 {
  return strlen($mailAddr) > 6 && preg_match("/^[\w\-\.]+@[\w\-]+(\.\w+)+$/", $mailAddr);
 }
    //过滤用户
    public function CheckUser($string,$replacement = '_')
    {
        $map = array(
            '/à|á|å|â|ä/' => 'a',
            '/è|é|ê|ẽ|ë/' => 'e',
            '/ì|í|î/' => 'i',
            '/ò|ó|ô|ø/' => 'o',
            '/ù|ú|ů|û/' => 'u',
            '/ç|č/' => 'c',
            '/ñ|ň/' => 'n',
            '/ľ/' => 'l',
            '/ý/' => 'y',
            '/ť/' => 't',
            '/ž/' => 'z',
            '/š/' => 's',
            '/æ/' => 'ae',
            '/ö/' => 'oe',
            '/ü/' => 'ue',
            '/Ä/' => 'Ae',
            '/Ü/' => 'Ue',
            '/Ö/' => 'Oe',
            '/ß/' => 'ss',
         '/ /'=>' ',
         '/　/'=>'',
         '/～|·|！|@|#|￥|%|…|&|×|（|）|-|\+|=|『|【|』|】|、|:|；|“|”|\'|《|，|》|。|？|\/|—|_|：|√|＜|°|丶|＞|－|★|｜|│|‖|ˇ/'=>' ',
          '/[^\w\s\x80-\xff]/' => ' ',
            '/\\s+/' => $replacement
        );
        $string = trim($string);
        $string = preg_replace(array_keys($map), array_values($map), $string);
        $string = preg_replace('/\\s+/',$replacement, strtolower($string));
        $string = trim($string,$replacement);
        return $string;
    }
    
    public function mktitle($string, $replacement = '_')
    {
        $map = array(
            '/à|á|å|â|ä/' => 'a',
            '/è|é|ê|ẽ|ë/' => 'e',
            '/ì|í|î/' => 'i',
            '/ò|ó|ô|ø/' => 'o',
            '/ù|ú|ů|û/' => 'u',
            '/ç|č/' => 'c',
            '/ñ|ň/' => 'n',
            '/ľ/' => 'l',
            '/ý/' => 'y',
            '/ť/' => 't',
            '/ž/' => 'z',
            '/š/' => 's',
            '/æ/' => 'ae',
            '/ö/' => 'oe',
            '/ü/' => 'ue',
            '/Ä/' => 'Ae',
            '/Ü/' => 'Ue',
            '/Ö/' => 'Oe',
            '/ß/' => 'ss',
         '/ /'=>' ',
         '/　/'=>'',
         '/～|·|！|@|#|￥|%|…|&|×|（|）|-|\+|=|『|【|』|】|、|:|；|“|”|\'|《|，|》|。|？|\/|—|_|：|√|＜|°|丶|＞|－|★|｜|│|‖|ˇ/'=>' ',
          '/[^\w\s^.\x80-\xff]/' => ' ',
            '/\\s+/' => $replacement
        );
        $string = trim($string);
        $string = preg_replace(array_keys($map), array_values($map), $string);
        $string = preg_replace('/\\s+/',$replacement, strtolower($string));
        $string = trim($string,$replacement);
        return $string;
    }
    
 // 全角替换成半角
    public function Qj2bj($string)
    {
  $qj2bj = array(
         '１' => '1', '２' => '2', '３' => '3', '４' => '4', '５' => '5',
         '６' => '6', '７' => '7', '８' => '8', '９' => '9', '０' => '0',
         'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd', 'ｅ' => 'e',
         'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i', 'ｊ' => 'j',
         'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n', 'ｏ' => 'o',
         'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's', 'ｔ' => 't',
         'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x', 'ｙ' => 'y',
         'ｚ' => 'z', 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D',
         'Ｅ' => 'E', 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I',
         'Ｊ' => 'J', 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N',
         'Ｏ' => 'O', 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S',
         'Ｔ' => 'T', 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X',
         'Ｙ' => 'Y', 'Ｚ' => 'Z', '　' => ' '
     );
     return strtr($string, $qj2bj);
    }
    
    public function DelNbsp($string)
    {
        $map = array(
         '/ /'=>' ',
         '/\?/'=>' ',
         '/　/'=>'',
        );
        $string = preg_replace(array_keys($map), array_values($map), $string);
     $string = preg_replace('/\\s+/','',$string);
     return $string;
    }
    public function getZipcode($str)
    {
     $pattern = "/[0-9]{1}(\d+){4,5}/";
     preg_match_all($pattern,$str,$zipcodeArr); 
     if(empty($zipcodeArr[0]))
  {
   return '';
  }
  else {
   return $zipcodeArr[0][0];
  }
    
    }
    public function checkZipcode($str)
    {
     $strwidth=strlen($str);
     $zipcode=$str;
     switch($strwidth)
     {
      case 4:$zipcode="00".$str;break;
      case 5:$zipcode="0".$str;break;
      case 6:$zipcode=$str;break;
      default:$zipcode="";break;
     }
     return $zipcode;
    }
    
 public function getEmail($str) { 
  $pattern = "/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/i"; 
  preg_match_all($pattern,$str,$emailArr); 
  if(empty($emailArr[0]))
  {
   return '';
  }
  else {
   $email_str=implode(",", $emailArr[0]);
   return $email_str;
  }
 } 
 public function getUrl($str)
 {
  $pattern = "/(http:\/\/|https:\/\/|ftp:\/\/)?([\w:\/\.\?=&-_]+)/is"; 
  preg_match_all($pattern,$str,$urlArr);
  if(empty($urlArr[0]))
  {
   return '';
  }
  else {
   $url_str=implode(",", $urlArr[0]);
   $url_str=preg_replace('/(http:\/\/|https:\/\/|ftp:\/\/)/','',$url_str);
   return $url_str;
  }
  
 }
 public function match_links($document) {  
 $match=array();  
    preg_match_all("'<\s*a\s.*?href\s*=\s*([\"\'])?(?(1)(.*?)\\1|([^\s\>]+))[^>]*>?(.*?)</a>'isx",$document,$links);                        
    while(list($key,$val) = each($links[2])) {
        if(!empty($val))
            $match['link'][] = $val;
    }
    while(list($key,$val) = each($links[3])) {
        if(!empty($val))
            $match['link'][] = $val;
    }        
    while(list($key,$val) = each($links[4])) {
        if(!empty($val))
            $match['content'][] = $val;
    }
    while(list($key,$val) = each($links[0])) {
        if(!empty($val))
            $match['all'][] = $val;
    }                
    return $match;
 }
    public function DelNoStr($string)
    {
        $map = array(
            '/à|á|å|â|ä/' => 'a',
            '/è|é|ê|ẽ|ë/' => 'e',
            '/ì|í|î/' => 'i',
            '/ò|ó|ô|ø/' => 'o',
            '/ù|ú|ů|û/' => 'u',
            '/ç|č/' => 'c',
            '/ñ|ň/' => 'n',
            '/ľ/' => 'l',
            '/ý/' => 'y',
            '/ť/' => 't',
            '/ž/' => 'z',
            '/š/' => 's',
            '/æ/' => 'ae',
            '/ö/' => 'oe',
            '/ü/' => 'ue',
            '/Ä/' => 'Ae',
            '/Ü/' => 'Ue',
            '/Ö/' => 'Oe',
            '/ß/' => 'ss',
         '/&nbsp;/'=>' ',
         '/　/'=>'',
         '/～|·|！|@|#|￥|%|…|&|×|（|）|-|\+|=|『|【|』|】|、|:|；|“|”|’|《|，|》|。|？|\/|—|_|‘|：|√|＜|°|丶|ˇ/'=>' ',
          '/[^\w\s\x80-\xff]/' => ' ',
           // '/\\s+/' => $replacement
        );
        $string = trim($string);
        $string = preg_replace(array_keys($map), array_values($map), $string);
        $string = preg_replace('/\\s+/','',$string);
        $string = trim($string,'');
        return $string;
    }
    public function UrlToStr($string, $find = '/-/')
    { 
        $string = preg_replace($find," ", strtolower($string));
        $string = trim($string);
        return $string;
    }
    
    public function GetPyLetter($str)
    {
     return substr(pinyin($str, $ucfirst=true), 0,1);
    }
    public function GetPinYin($str)
    {
     return strtolower(pinyin($str, $ucfirst=true));
    }
 
 public function DelCode($str)
    {
     
  $search = array("'<script[^>]*?>.*?</script>'si", // strip out javascript
      "'<[\/\!]*?[^<>]*?>'si",   // strip out html tags
      "'([\r\n])[\s]+'",     // strip out white space
      "'&(quot|#34|#034|#x22);'i",  // replace html entities
      "'&(amp|#38|#038|#x26);'i",   // added hexadecimal values
      "'&(lt|#60|#060|#x3c);'i",
      "'&(gt|#62|#062|#x3e);'i",
      "'&(nbsp|#160|#xa0);'i",
      "'&(iexcl|#161);'i",
      "'&(cent|#162);'i",
      "'&(pound|#163);'i",
      "'&(copy|#169);'i",
      "'&(reg|#174);'i",
      "'&(deg|#176);'i",
      "'&(#39|#039|#x27);'",
      "'&(euro|#8364);'i",    // europe
      "'&a(uml|UML);'",     // german
      "'&o(uml|UML);'",
      "'&u(uml|UML);'",
      "'&A(uml|UML);'",
      "'&O(uml|UML);'",
      "'&U(uml|UML);'",
      "'&szlig;'i",
      );
  $replace = array("",
       "",
       "\\1",
       "\"",
       "&",
       "<",
       ">",
       " ",
       chr(161),
       chr(162),
       chr(163),
       chr(169),
       chr(174),
       chr(176),
       chr(39),
       chr(128),
       "?",
       "?",
       "?",
       "?",
       "?",
       "?",
       "?",
      );
  $str = preg_replace($search,$replace,$str);
  return trim($str);
    }
    
 
 public function CutStr($sourcestr,$cutlength)
 {
    $returnstr='';
    $i=0;
    $n=0;
    $sourcestr=rtrim(SeoTools::DelCode($sourcestr));
    $str_length=strlen($sourcestr);//字符串的字节数
  while (($n<$cutlength) and ($i<=$str_length))
  {
       $temp_str=substr($sourcestr,$i,1);
       $ascnum=Ord($temp_str);//得到字符串中第$i位字符的ascii码
       if ($ascnum>=224)    //如果ASCII位高与224，
       {
   $returnstr=$returnstr.substr($sourcestr,$i,3); //根据UTF-8编码规范，将3个连续的字符计为单个字符       
          $i=$i+3;            //实际Byte计为3
          $n++;            //字串长度计1
       }
       elseif ($ascnum>=192) //如果ASCII位高与192，
       {
          $returnstr=$returnstr.substr($sourcestr,$i,2); //根据UTF-8编码规范，将2个连续的字符计为单个字符
          $i=$i+2;            //实际Byte计为2
          $n++;            //字串长度计1
       }
       elseif ($ascnum>=65 && $ascnum<=90) //如果是大写字母，
       {
          $returnstr=$returnstr.substr($sourcestr,$i,1);
          $i=$i+1;            //实际的Byte数仍计1个
          $n++;            //但考虑整体美观，大写字母计成一个高位字符
       }
       else                //其他情况下，包括小写字母和半角标点符号，
       {
          $returnstr=$returnstr.substr($sourcestr,$i,1);
          $i=$i+1;            //实际的Byte数计1个
          $n=$n+0.5;        //小写字母和半角标点等与半个高位字符宽...
       }
  }
  if ($str_length>$i){
   $returnstr = $returnstr . ".";//超过长度时在尾处加上省略号
  }
     return htmlspecialchars($returnstr);
 }
 
 public function CreateTagLink($tags_str)
 {
  $tags_array=explode(",",$tags_str);
  $link_tpl="";
  foreach($tags_array as $v)
  {
   $tag=trim($v);
   $alias=SeoTools::friendlyURL($tag);
  // $link_tpl.='<a href="/s/'.urlencode($alias).'" title="'.$tag."">'.$tag.'</a>&nbsp;&nbsp;';
   $link_tpl.=$tag.'&nbsp;&nbsp;';
  }
  return $link_tpl;
 }
 
}
 

/**
 * 中文转拼类
 *
 * @author  Lukin <my@lukin.cn>
 * @date    2011-01-25 10:44
 */
class PinYin {
    // 码表
    private $fp  = null;
    private $dat = 'pinyin.dat';
    public function __construct(){
        $this->dat = dirname(__FILE__).'/'.$this->dat;
        if (is_file($this->dat)) {
            $this->fp = fopen($this->dat, 'rb');
        }
    }
    /**
     * 转拼音
     *
     * @param string $str   汉字
     * @param bool $ucfirst 首字母大写
     * @param bool $polyphony 忽略多读音
     * @return string
     */
    public function encode($str, $ucfirst=true, $polyphony=true) {
        $ret = ''; $len = mb_strlen($str, 'UTF-8');
        for ($i = 0; $i < $len; $i++) {
            $py = $this->pinyin(mb_substr($str, $i, 1, 'UTF-8'));
            if ($ucfirst && strpos($py,',') !== false) {
                $pys = explode(',', $py); 
                $ret.= implode(',', array_map('ucfirst', ($polyphony ? array_slice($pys, 0, 1) : $pys)));
            } else {
                $ret.= $ucfirst ? ucfirst($py) : $py;
              
            }
        }
        
        return $ret;
    }
    /**
     * 汉字转十进制
     *
     * @param string $word
     * @return number
     */
    private function char2dec($word) {
        $bins  = '';
        $chars = str_split($word);
        foreach($chars as $char) $bins.= decbin(ord($char));
        $bins = preg_replace('/^.{4}(.{4}).{2}(.{6}).{2}(.{6})$/', '$1$2$3', $bins);
        return bindec($bins);
    }
    /**
     * 单个字转拼音
     *
     * @param string $char  汉字
     * @return string
     */
    public function pinyin($char){
        if (strlen($char) == 3 && $this->fp) {
            $offset = $this->char2dec($char);
            // 判断 off 值
            if ($offset >= 0) {
                fseek($this->fp, ($offset - 19968) << 4, SEEK_SET);
                return trim(fread($this->fp, 16));
            }
        }
        return $char;
    }
    public function __destruct() {
        if ($this->fp) {
            fclose($this->fp);
        }
    }
}
/**
 * 取得实例
 *
 * @return $pinyin
 */
function &_pinyin_get_object() {
    static $pinyin;
 if ( is_null($pinyin) )
  $pinyin = new PinYin();
 return $pinyin;
}
if (!function_exists('pinyin')) :
/**
 * 取得拼音
 *
 * @param string $str
 * @param bool $ucfirst 首字母大写
 * @return string
 */
function pinyin($str, $ucfirst=true) {
    $py = _pinyin_get_object();
    return $py->encode($str, $ucfirst);
}
endif;


/***   代码来自四海网（www.q1010.com）   ***/

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关键词：SEO,过滤类