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PHP | strip_tags() Function

  • Last Updated : 02 Nov, 2020

The strip_tags() function is an inbuilt function in PHP which is used to strips a string from HTML, and PHP tags. This function returns a string with all NULL bytes, HTML, and PHP tags stripped from a given $str.

Syntax: 

string strip_tags( $str, $allowable_tags ) 



Parameters: This function accepts two parameters as mentioned above and described below: 

  • $string: It is a required parameter that specifies the string to be check.
  • $allow: It is an optional parameter that specifies allowable tags. These tags will not be removed.

Return Value: This function Returns the stripped string.

Exceptions:  



  • This function strip HTML comments and PHP tags. It can not be used this in $allow tags because this is already hardcoded.
  • PHP 5.3.4 and later versions, ignored the self-closing XHTML tags
  • strip_tags() does not validate the HTML.

Below programs illustrate the strip_tags() function in PHP: 

Program 1:  

PHP




<?php
 
// PHP programme to illustrate
// strip_tags function without $allow parameter
echo strip_tags("Hello <b>GeeksforGeeks!</b>");
?>
Output: 
Hello GeeksforGeeks!




 

Program 2: 

PHP




<?php
 
// PHP programme to illustrate
// strip_tags function with $allow parameter
 
echo strip_tags("Hello <b><i>GeeksorGeeks!</i></b>", "<b>");
?>
Output: 
Hello <b>GeeksorGeeks!</b>




 

Related Articles: 

Reference: http://php.net/manual/en/function.strip-tags.php
 

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