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XHTML indent 0.02.00 (Default branch)
10-31-2008
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STRIP_TAGS(3) 1 STRIP_TAGS(3) strip_tags - Strip HTML and PHP tags from a string SYNOPSIS
string strip_tags (string $str, [string $allowable_tags]) DESCRIPTION
This function tries to return a string with all NULL bytes, HTML and PHP tags stripped from a given $str. It uses the same tag stripping state machine as the fgetss(3) function. PARAMETERS
o $str - The input string. o $allowable_tags - You can use the optional second parameter to specify tags which should not be stripped. Note HTML comments and PHP tags are also stripped. This is hardcoded and can not be changed with $allowable_tags. Note This parameter should not contain whitespace. strip_tags(3) sees a tag as a case-insensitive string between < and the first whitespace or >. Note In PHP 5.3.4 and later, you will also need to include the self-closing XHTML tag to strip these from $str. For example, to strip both <br> and <br/>, you should use: <?php strip_tags($input, '<br><br/>'); ?> RETURN VALUES
Returns the stripped string. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.4 | | | | | | | strip_tags(3) no longer strips self-closing XHTML | | | tags unless the self-closing XHTML tag is also | | | given in $allowable_tags. | | | | | 5.0.0 | | | | | | | strip_tags(3) is now binary safe. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 strip_tags(3) example <?php $text = '<p>Test paragraph.</p><!-- Comment --> <a href="#fragment">Other text</a>'; echo strip_tags($text); echo " "; // 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> NOTES
Warning Because strip_tags(3) 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. Note Tag names within the input HTML that are greater than 1023 bytes in length will be treated as though they are invalid, regardless of the $allowable_tags parameter. SEE ALSO
htmlspecialchars(3). PHP Documentation Group STRIP_TAGS(3)