How to strip HTML tags, scripts, and styles from a web page

[senyo]

I found this script http://nadeausoftware.com/articles/2007/09/php_tip_how_strip_html_tags_web_page that should strip HTML tags, scripts, and styles from a web page but it doesn't.

 

What is the problem?

[senyo]

I use PHP 5

[JonnoTheDev]

Read on the function

http://uk3.php.net/strip_tags

[senyo]

How to use it?

[senyo]

I tried all the every script but they don't work together

[senyo]

I don't think that this script work, maybe it worked but now it is useless

[JAY6390]

$output = strip_tags($input_text);

[senyo]

$output = strip_tags($input_text);

 

What is the purpose of this?

[mikesta707]

... it strips php tags from the strings, which seems pretty obvious given its name. Before you try to use someone else's code, I suggest you learn PHP basics, or at least so you can actually make it work. it seems you don't even know how functions work

[senyo]

I know what it is the name but it doesn't actually work any this is not important

 

My question is why this script doesn't work? 

<?php

 

/**

* Strip out (X)HTML tags and invisible content.  This function

* is useful as a prelude to tokenizing the visible text of a page

* for use in a search engine or spam detector/remover.

*

* Unlike PHP's built-in strip_tags() function, this function will

* remove invisible parts of a web page that normally should not be

* indexed or passed through a spam filter.  This includes style

* blocks, scripts, applets, embedded objects, and everything in the

* page header.

*

* In anticipation of tokenizing the visible text, this function

* detects (X)HTML block tags (such as divs, paragraphs, and table

* cells) and inserts a carriage return before each one.  This

* insures that after tags are removed, words before and after the

* tag are not erroneously joined into a single word.

*

* Parameters:

* text the (X)HTML text to strip

*

* Return values:

* the stripped text

*

* See:

* http://nadeausoftware.com/articles/2007/09/php_tip_how_strip_html_tags_web_page

*/

 

 

 

 

function strip_html_tags( $text )

{

// PHP's strip_tags() function will remove tags, but it

// doesn't remove scripts, styles, and other unwanted

// invisible text between tags.  Also, as a prelude to

// tokenizing the text, we need to insure that when

// block-level tags (such as <p> or <div>) are removed,

// neighboring words aren't joined.

$text = preg_replace(

array(

// Remove invisible content

'@<head[^>]*?>.*?</head>@siu',

'@<style[^>]*?>.*?</style>@siu',

'@<script[^>]*?.*?</script>@siu',

'@<object[^>]*?.*?</object>@siu',

'@<embed[^>]*?.*?</embed>@siu',

'@<applet[^>]*?.*?</applet>@siu',

'@<noframes[^>]*?.*?</noframes>@siu',

'@<noscript[^>]*?.*?</noscript>@siu',

'@<noembed[^>]*?.*?</noembed>@siu',

 

// Add line breaks before & after blocks

'@<((br)|(hr))@iu',

'@</?((address)|(blockquote)|(center)|(del))@iu',

'@</?((div)|(h[1-9])|(ins)|(isindex)|(p)|(pre))@iu',

'@</?((dir)|(dl)|(dt)|(dd)|(li)|(menu)|(ol)|(ul))@iu',

'@</?((table)|(th)|(td)|(caption))@iu',

'@</?((form)|(button)|(fieldset)|(legend)|(input))@iu',

'@</?((label)|(select)|(optgroup)|(option)|(textarea))@iu',

'@</?((frameset)|(frame)|(iframe))@iu',

),

array(

' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',

"\n\$0", "\n\$0", "\n\$0", "\n\$0", "\n\$0", "\n\$0",

"\n\$0", "\n\$0",

),

$text );

 

// Remove all remaining tags and comments and return.

return strip_tags( $text );

}

 

 

?>

 

[JAY6390]

This line

@<head[^>]*?>.*?</head>@siu',

should be

'@<head[^>]*?>.*?</head>@siu',

 

Note the missing apostrophe at the beginning of the first

[senyo]

that is not the problem, the script has the apostrophe, the forum doesn't shows it

[mikesta707]

please put your code in code tags. How are you using the function? can you show an example of where you use it in your code. that function seems perfectly fine...

[JAY6390]

I see. That script is a FUNCTION ONLY and as such it doesn't execute. It is meant to be used with your own code where you call the function. There is nothing wrong with it

[senyo]

so this script only shows the striped tags?

[mikesta707]

.. do you know what a function is? if you don't; learn PHP before you try to just copy paste code and put it on your website. debugging your code will be much less of a headache