Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > body text

PHP multiple methods of filtering html tags_PHP tutorial

WBOY
Release： 2016-07-13 17:09:44
Original
2305 people have browsed it

This article collects a variety of methods about the php tutorial method of filtering html tags, including using PHP's own functions to filter html tags, and also using user-defined functions and regular expressions to filter html. Tag, okay, let’s look at the two simplest methods first.

Method 1

echo strip_tags("hello world!");


strip_tags --- Remove html and php tags from strings

Syntax: string strip_tags (string str [, string allowable_tags])

Description:

This function tries to remove all html and php tags from the given string. If it is an incomplete or false tag, an error will occur. It uses the same method as fgetss() to remove tags.

$reg = '/(|)|<.+?>/i';
echo preg_replace($reg,'$1',$str);
?>

Filtering method two

function delhtml($str){ //Clear html tag
$st=-1; //Start
$et=-1; //End
$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;
}

Filtering method three

function clear_html_label($html)
{
$search = array ("']*?>.*?'si", "'<[/!]*?[^<>]*? >'si", "'([rn])[s]+'", "'&(quot|#34);'i", "'&(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");
$replace = array ("", "", "1", """, "&", "<", ">", " ", chr(161), chr(162), chr(163) , chr(169), "chr(1)");

return preg_replace($search, $replace, $html);
}

//Example application

$string ='aaa

Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template

Public welfare online PHP training，Help PHP learners grow quickly！

About us Disclaimer Sitemap

© php.cn All rights reserved