在给网站页面做ＳＥＯ的时候，长用到得一些函数。
比如：良好ＵＲＬ生成，用户名过滤，ｅｍａｉｌ检测，截取字符串，全角替换成半角，删除ｈｔｍｌ等
1. [PHP]代码
<?php
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',
'/ /'=>' ',
'/ /'=>'',
'/～|·|！|@|#|￥|%|…|&|×|（|）|-|\+|=|『|【|』|】|、|:|；|“|”|’|《|，|》|。
|？|\/|—|_|‘|：|√|＜|°|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);'",
"'ß'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> ';
$link_tpl.=$tag.' ';
}
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;以上就是分享一个PHP 网站SEO及过滤类，方便使用的内容，更多相关内容请关注PHP中文网（m.sbmmt.com）！
![[Web フロントエンド] Node.js クイック スタート](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
