strip_tags

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.

注意: 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.

警告

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

警告

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.

例 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>');
?>

上例将输出：

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