php去掉html标签函数代码

<?php
function noHTML($content)
{
  $content = preg_replace("/<a[^>]*>/i",'', $content);  
  $content = preg_replace("/</a>/i", '', $content);   
  $content = preg_replace("/<div[^>]*>/i",'', $content);  
  $content = preg_replace("/</div>/i",'', $content);
  $content = preg_replace("/<font[^>]*>/i",'', $content);  
  $content = preg_replace("/</font>/i",'', $content);
  $content = preg_replace("/<p[^>]*>/i",'', $content);  
  $content = preg_replace("/</p>/i",'', $content);
  $content = preg_replace("/<span[^>]*>/i",'', $content);  
  $content = preg_replace("/</span>/i",'', $content);
  $content = preg_replace("/<?xml[^>]*>/i",'', $content);
  $content = preg_replace("/</?xml>/i",'', $content);
  $content = preg_replace("/<o:p[^>]*>/i",'', $content);
  $content = preg_replace("/</o:p>/i",'', $content);
  $content = preg_replace("/<u[^>]*>/i",'', $content);
  $content = preg_replace("/</u>/i",'', $content);
  $content = preg_replace("/<b[^>]*>/i",'', $content);
  $content = preg_replace("/</b>/i",'', $content);
  $content = preg_replace("/<meta[^>]*>/i",'', $content);
       $content = preg_replace("/</meta>/i",'', $content);
  $content = preg_replace("/<!--[^>]*-->/i",'', $content);//注释内容 
  $content = preg_replace("/<p[^>]*-->/i",'', $content);//注释内容      
  $content = preg_replace("/style=.+?['|"]/i",'',$content);//去除样式  
  $content = preg_replace("/class=.+?['|"]/i",'',$content);//去除样式  
  $content = preg_replace("/id=.+?['|"]/i",'',$content);//去除样式     
  $content = preg_replace("/lang=.+?['|"]/i",'',$content);//去除样式      
  $content = preg_replace("/width=.+?['|"]/i",'',$content);//去除样式   
  $content = preg_replace("/height=.+?['|"]/i",'',$content);//去除样式   
  $content = preg_replace("/border=.+?['|"]/i",'',$content);//去除样式   
  $content = preg_replace("/face=.+?['|"]/i",'',$content);//去除样式
  $content = preg_replace("/face=.+?['|"]/",'',$content);
  $content = preg_replace("/face=.+?['|"]/",'',$content);
  $content=str_replace( "&nbsp;","",$content);
  return $content;
}