PHP将HTML转换成文本一些方法总结

<?php
$mystr=<<<SATO
此处省略几十行HTML代码^_^
SATO;
$str=strip_tags($mystr);
//到这里就已经达到我的HTML转为TXT文本的目的了，哈哈，使用这个函数真方便
//下面是插件的一些切词等操作，这里就不多说了
?>

<?php
// $document 应包含一个 HTML 文档。
// 本例将去掉 HTML 标记，javascript 代码
// 和空白字符。还会将一些通用的
// HTML 实体转换成相应的文本。

$search = array ("'<script[^>]*?>.*?</script>'si",  // 去掉 javascript
                 "'<[/!]*?[^<>]*?>'si",           // 去掉 HTML 标记
                 "'([rn])[s]+'",                 // 去掉空白字符
                 "'&(quot|#34);'i",                 // 替换 HTML 实体
                 "'&(amp|#38);'i",
                 "'&(lt|#60);'i",
                 "'&(gt|#62);'i",
                 "'&(nbsp|#160);'i",
                 "'&(iexcl|#161);'i",
                 "'&(cent|#162);'i",
                 "'&(pound|#163);'i",
                 "'&(copy|#169);'i",
                 "'&#(d+);'e");                    // 作为 PHP 代码运行

$replace = array ("",
                  "",
                  "\1",
                  """,
                  "&",
                  "<",
                  ">",
                  " ",
                  chr(161),
                  chr(162),
                  chr(163),
                  chr(169),
                  "chr(\1)");

$text = preg_replace ($search, $replace, $document);
?>

function html2text($str,$encode = 'GB2312')
{

  $str = preg_replace("/<style .*?</style>/is", "", $str);
  $str = preg_replace("/<script .*?</script>/is", "", $str);
  $str = preg_replace("/<br s*/?/>/i", "n", $str);
  $str = preg_replace("/</?p>/i", "nn", $str);
  $str = preg_replace("/</?td>/i", "n", $str);
  $str = preg_replace("/</?div>/i", "n", $str);
  $str = preg_replace("/</?blockquote>/i", "n", $str);
  $str = preg_replace("/</?li>/i", "n", $str);

  $str = preg_replace("/&nbsp;/i", " ", $str);
  $str = preg_replace("/&nbsp/i", " ", $str);

  $str = preg_replace("/&amp;/i", "&", $str);
  $str = preg_replace("/&amp/i", "&", $str);

  $str = preg_replace("/&lt;/i", "<", $str);
  $str = preg_replace("/&lt/i", "<", $str);

  $str = preg_replace("/&ldquo;/i", '"', $str);
  $str = preg_replace("/&ldquo/i", '"', $str);

     $str = preg_replace("/&lsquo;/i", "'", $str);
     $str = preg_replace("/&lsquo/i", "'", $str);

     $str = preg_replace("/&rsquo;/i", "'", $str);
     $str = preg_replace("/&rsquo/i", "'", $str);

  $str = preg_replace("/&gt;/i", ">", $str);
  $str = preg_replace("/&gt/i", ">", $str);

  $str = preg_replace("/&rdquo;/i", '"', $str);
  $str = preg_replace("/&rdquo/i", '"', $str);

  $str = strip_tags($str);
  $str = html_entity_decode($str, ENT_QUOTES, $encode);
  $str = preg_replace("/&#.*?;/i", "", $str);
    
  return $str;
}

//冒泡法排序
//随便给出一个乱序数组
$arr = array(0,2,10,9,19,23,89,112,321,234);
//统计数组
$num = count($arr);
//冒泡倒序排列
for($i=0;$i<$num-1;$i++){
 for($m=0;$m<$num-1;$m++){
  if($arr[$m]<$arr[$m+1]){
   $temp = $arr[$m];
   $arr[$m] = $arr[$m+1];
   $arr[$m+1] = $temp;
  }
  // echo $arr[$m].'<br>';
 }
}
//输出排序后的结果
var_dump($arr);
//冒泡顺序排列
for($x=0;$x<$num-1;$x++){
 for($y=0;$y<$num-1;$y++){
  if($arr[$y]>$arr[$y+1]){
   $temp = $arr[$y];
   $arr[$y] = $arr[$y+1];
   $arr[$y+1] = $temp;
  }
 }
}
//输出排序后的结果
var_dump($arr);
//二分法查找
function dichotomy($array,$k,$low=0,$high=0){
 if(count($array)!= 0 && $high == 0){
  $high = count($array);
 }
 if($low <= $high){
  $mid = intval(($low+$high)/2);
  if( $array[$mid] == $k ){
   return $mid;
  }elseif( $k<$array[$mid]){
   return dichotomy( $array,$k,$low=0,$mid-1);
  }else{
   return dichotomy( $array,$k,$mid+1,$high);
  }
 }else{
  return false;
 }
}
//输出查找结果
echo dichotomy($arr,23);

setcookie("hzhuti",$s,time()+3600*12,'/','*.www.111cn.net');

setcookie("hzhuti",$s,time()+3600*12,'/','.www.111cn.net');

setcookie("hzhuti",$s,time()+3600*12,'/','www.111cn.net');

setcookie("hzhuti",$s,time()+3600*12,'/','ss.www.111cn.net');

<?php
/**
* php cookie类
* class：PHP_COOKIE
*/
class PHP_COOKIE
{
  var $_name  = "";
  var $_val   = array();
  var $_expires;
  var $_dir   = '/';// all dirs
  var $_site  = '';

  function PHP_COOKIE($cname, $cexpires="", $cdir="/", $csite="")
  {
$this->_name=$cname;

if($cexpires){
  $this->_expires=$cexpires;
}
else{
  $this->_expires=time() + 60*60*24*30*12; // ~12 months
}

$this->_dir=$cdir;
$this->_site=$csite;
$this->_val=array();
$this->extract();
  }

  function extract($cname="")
  {
if(!isset($_COOKIE)){
  global $_COOKIE;
  $_COOKIE=$GLOBALS["HTTP_COOKIE_VARS"];
}

if(empty($cname) && isset($this)){
  $cname=$this->_name;
}
 
if(!empty($_COOKIE[$cname])){

  if(get_magic_quotes_gpc()){
$_COOKIE[$cname]=stripslashes($_COOKIE[$cname]);
  }
  $arr=unserialize($_COOKIE[$cname]);

  if($arr!==false && is_array($arr)){

foreach($arr as $var => $val){

  $_COOKIE[$var]=$val;

  if(isset($GLOBALS["PHP_SELF"])){
  $GLOBALS[$var]=$val;
  }
}
  }

  if(isset($this)) $this->_val=$arr;

}
// 在全局范围内移除cookie
unset($_COOKIE[$cname]);
unset($GLOBALS[$cname]);
}

function put($var, $value)
{
$_COOKIE[$var]=$value;
$this->_val["$var"]=$value;

if(isset($GLOBALS["PHP_SELF"])){
  $GLOBALS[$var]=$value;
}

if(empty($value)){
  unset($this->_val[$var]);
}

  }

  function clear()
  {
$this->_val=array();
  }

  function set()
  {
if(empty($this->_val)){
  $cookie_val="";
} 
else {
  $cookie_val=serialize($this->_val);
}
 
if(strlen($cookie_val)>4*1024){
  trigger_error("The cookie $this->_name exceeds the specification for the maximum cookie size.  Some data may be lost", E_USER_WARNING);
}
setcookie("$this->_name", $cookie_val, $this->_expires, $this->_dir, $this->_site);
  }
}
?>

 <link rel="stylesheet" type="text/css" media="screen" href="/style.css"/>

 <link rel="stylesheet" type="text/css" media="screen" href="/style.css.php"/>