text.lib.php

完美的在线教育系统

<?php // $Id: text.lib.php 15174 2008-04-29 18:00:04Z yannoo $
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2004-2008 Dokeos S.A.
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)
	Copyright (c) various contributors

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	See the GNU General Public License for more details.

	Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, [e-mail]
==============================================================================
*/
/**
==============================================================================
*	This is the text library for Dokeos.
*	Include/require it in your code to use its functionality.
*
*	@package dokeos.library
==============================================================================
*/

/*
==============================================================================
		FUNCTIONS
==============================================================================
*/

/**
 * function make_clickable($string)
 *
 * @desc   completes url contained in the text with "<a href ...".
 *         However the function simply returns the submitted text without any
 *         transformation if it already contains some "<a href:" or "<img src=".
 * @param string $text text to be converted
 * @return text after conversion
 * @author Rewritten by Nathan Codding - Feb 6, 2001.
 *         completed by Hugues Peeters - July 22, 2002
 *
 * Actually this function is taken from the PHP BB 1.4 script
 * - Goes through the given string, and replaces xxxx://yyyy with an HTML <a> tag linking
 * 	to that URL
 * - Goes through the given string, and replaces www.xxxx.yyyy[zzzz] with an HTML <a> tag linking
 * 	to http://www.xxxx.yyyy[/zzzz]
 * - Goes through the given string, and replaces xxxx@yyyy with an HTML mailto: tag linking
 *		to that email address
 * - Only matches these 2 patterns either after a space, or at the beginning of a line
 *
 * Notes: the email one might get annoying - it's easy to make it more restrictive, though.. maybe
 * have it require something like [e-mail] or such. We'll see.
 */

function make_clickable($string)
{
	if(!stristr($string,' src=') && !stristr($string,' href='))
	{
		$string=eregi_replace("(https?|ftp)://([a-z0-9#?/&=._+:~%-]+)","<a href=\"\\1://\\2\" target=\"_blank\">\\1://\\2</a>",$string);
		$string=eregi_replace("([a-z0-9_.-]+@[a-z0-9.-]+)","<a href=\"mailto:\\1\">\\1</a>",$string);
	}

	return $string;
}

/**
 * formats the date according to the locale settings
 *
 * @author  Patrick Cool <[e-mail]>, Ghent University
 * @author  Christophe Gesch锟