How to implement regular replacement tags in php

How to implement regular replacement tags in php: first strip the HTML tags in the string through the "strip_tags" function; then use regular expressions to replace the tags, code statements such as "pregreplace("/\s /", "",str=pregreplace("/\s /","")".

##Recommended: "

PHP Video Tutorial"

1.strip_tags (Strip the HTML tags in the string)

strip_tags () function strips HTML, XML and PHP tags in strings.

2. String replacement

str_replace(array(" "," ","\t" ,"\r\n","\r","\n"),array("","","","","","")

3. Use regular expressions Formula (slightly less efficient)

str=pregreplace("/\s /","",str); //Filter excess carriage returns

str=pregreplace("/<[] /si","<",str); //Filter <__(with a space after the "<" sign)

str=pregreplace("/<−−.∗?−−>/si","",str); //Comments

##str=pregreplace("/< ;(.∗?)>/si","",str); //Filter DOCTYPE

##str=pregreplace("/<(\/?html.∗? )>/si","",str); //Filter html tags

##str=pregreplace("/<(\/?head.∗?)>/ si","",str); //Filter head tag

str=pregreplace("/<(\/?meta.∗?)>/si"," ",str); //Filter meta tags

##str=pregreplace("/<(\/?body.∗?)>/si","",str) ; //Filter body tag

str=pregreplace("/<(\/?link.∗?)>/si","",str); //Filter link tag

str=pregreplace("/<(\/?form.∗?)>/si","",str); //Filter form tag

str=pregreplace("/cookie/si","COOKIE",str); //Filter COOKIE tags

str=pregreplace(" /<(applet.?)>(.*?)<(\/applet.*?)>/si","",str); //Filter applet tags

str=pregreplace("/<(\/?applet.∗?)>/si","",str); //Filter applet tags

str=pregreplace("/<(style.∗?)>(.∗?)<(\/style.∗?)>/si","",str); //Filter style tag

str=pregreplace("/<(\/?style.∗?)>/si","",str); //Filter style tags

str=pregreplace("/<(title.∗?)>(.∗?)<(\/title.∗?)>/si","",str); //Filter title tag

str=pregreplace("/<(\/?title.∗?)>/si","",str); //Filter title Tag

##str=pregreplace("/<(object.∗?)>(.∗?)<(\/object.∗?)>/si", "",str); //Filter object tag

##str=pregreplace("/<(\/?objec.∗?)>/si","",str ; >/si","",str); //Filter noframes tag

##str=pregreplace("/<(\/?noframes.∗?)>/si ","",str); //Filter noframes tag

##str=pregreplace("/<(i?frame.∗?)>(.∗?)< (\/i?frame.∗?)>/si","",str); //Filter frame tag

##str=pregreplace("/<(\/ ?i?frame.∗?)>/si","",str); //Filter frame tag

##str=pregreplace("/<(script.∗? )>(.∗?)<(\/script.∗?)>/si","",str); //Filter script tags

str=pregreplace("/<(\/?script.∗?)>/si","",str); //Filter script tags

str=pregreplace("/javascript/si","Javascript",str); //Filter script tags

##str=pregreplace("/vbscript/si","Vbscript ",str); //Filter script tags

##str=pregreplace("/on([a−z] )\s∗=/si","On1=",str ); //Filter script tags

str=preg_replace("//si","",str); //Filter script tags, such as javAsCript:alert(

##str=pregreplace("/<(\/?.∗?)>/si","",str);//Match any html tag method

this−>content=pregreplace("/<(\/?.∗?)>/si","",this->content);// Filter most html tags

$str=preg_replace("/\s+/", " ",$

The above is the detailed content of How to implement regular replacement tags in php. For more information, please follow other related articles on the PHP Chinese website!