strip_tags

(PHP 3 >= 3.0.8, PHP 4, PHP 5)

strip_tags -- Strip HTML and PHP tags from a string

Description

string strip_tags ( string str [, string allowable_tags] )

This function tries to return a string with all HTML and PHP tags stripped from a given str. It uses the same tag stripping state machine as the fgetss() function.

You can use the optional second parameter to specify tags which should not be stripped.

Note: allowable_tags was added in PHP 3.0.13 and PHP 4.0.0.

Since PHP 4.3.0, HTML comments are also stripped. This is hardcoded and can not be changed with allowable_tags.

Warning

Because strip_tags() does not actually validate the HTML, partial, or broken tags can result in the removal of more text/data than expected.

Warning

This function does not modify any attributes on the tags that you allow using allowable_tags, including the style and onmouseover attributes that a mischievous user may abuse when posting text that will be shown to other users.

Example 1. strip_tags() example

<?php
$text
= '<p>Test paragraph.</p><!-- Comment --> <a href="#fragment">Other text</a>';
echo
strip_tags($text);
echo
"\n";

// Allow <p> and <a>
echo strip_tags($text, '<p><a>');
?>

The above example will output:

Test paragraph. Other text
<p>Test paragraph.</p> <a href="#fragment">Other text</a>

strip_tags() has been binary safe since PHP 5.0.0

See also htmlspecialchars().