Example analysis of php filtering html tags

PHP implements example analysis of filtering html tags

<?php
function kill_html($str){   //清除HTML标签
$st=-1; //开始
$et=-1; //结束
$stmp=array();
$stmp[]=" ";
$len=strlen($str);
for($i=0;$i<$len;$i++){
   $ss=substr($str,$i,1);
   if(ord($ss)==60){ //ord("<")==60
    $st=$i;
   }
   if(ord($ss)==62){ //ord(">")==62
    $et=$i;
    if($st!=-1){
     $stmp[]=substr($str,$st,$et-$st+1);
    }
   }
}
$str=str_replace($stmp,"",$str);
return $str;
}
?>

The above is the detailed content of Example analysis of php filtering html tags. For more information, please follow other related articles on the PHP Chinese website!