Strip Tags: Expression Engine plugin to strip tags from text blocks

pi.strip_tags.php

<?php

/*
=====================================================
 ExpressionEngine - by pMachine
-----------------------------------------------------
 http://www.pmachine.com/
=====================================================
 This plugin was created by Eoghan O'Brien
 - http://eoghanobrien.com/
 
 This work is licensed under a
 Creative Commons Attribution-ShareAlike 2.5 License.
 - http://creativecommons.org/licenses/by-sa/2.5/
=====================================================
 File: pi.strip_tags.php
-----------------------------------------------------
 Purpose: Strip tags
=====================================================

*/

$plugin_info = array
(
    'pi_name'          => 'Strip Tags',
    'pi_version'       => '1.0',
    'pi_author'        => 'Eoghan OBrien',
    'pi_author_url'    => 'http://eoghanobrien.com/',
    'pi_description'   => 'Strips tags out of text.',
    'pi_usage'         => Strip_tags::usage()
);

class Strip_tags {

    var $return_data;

    // ----------------------------------------
    //  Find and Replace
    // ----------------------------------------

    function Strip_tags()
    {
        global $TMPL;

        $allowable	= ($TMPL->fetch_param('allowable') !== FALSE) ? $TMPL->fetch_param('replace') : '';
        $text		= $TMPL->tagdata;
        
        $this->return_data = strip_tags($text, $allowable);
    }
    // END
    
    
// ----------------------------------------
//  Plugin Usage
// ----------------------------------------

// This function describes how the plugin is used.

function usage()
{
ob_start(); 
?>
This plugin works pretty much the same as the php strip_tags() function.

*** PARAMETERS ***
allowable="<p><a><ul><ol><li><blockquote>"

*** EXAMPLES ***
{exp:strip_tags allowable="<p><a>"}<p>This is a <a href="http://google.com">link</a></p>{/exp:strip_tags}
<?php
$buffer = ob_get_contents();
	
ob_end_clean(); 

return $buffer;
}
// END

}
// END CLASS


?>