Web/fckeditor/fckeditor_php4.php

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<?php
/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2008 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * This is the integration file for PHP 4.
 *
 * It defines the FCKeditor class that can be used to create editor
 * instances in PHP pages on server side.
 */

/**
 * Check if browser is compatible with FCKeditor.
 * Return true if is compatible.
 *
 * @return boolean
 */
function FCKeditor_IsCompatibleBrowser()
{
	if ( isset( $_SERVER ) ) {
		$sAgent = $_SERVER['HTTP_USER_AGENT'] ;
	}
	else {
		global $HTTP_SERVER_VARS ;
		if ( isset( $HTTP_SERVER_VARS ) ) {
			$sAgent = $HTTP_SERVER_VARS['HTTP_USER_AGENT'] ;
		}
		else {
			global $HTTP_USER_AGENT ;
			$sAgent = $HTTP_USER_AGENT ;
		}
	}

	if ( strpos($sAgent, 'MSIE') !== false && strpos($sAgent, 'mac') === false && strpos($sAgent, 'Opera') === false )
	{
		$iVersion = (float)substr($sAgent, strpos($sAgent, 'MSIE') + 5, 3) ;
		return ($iVersion >= 5.5) ;
	}
	else if ( strpos($sAgent, 'Gecko/') !== false )
	{
		$iVersion = (int)substr($sAgent, strpos($sAgent, 'Gecko/') + 6, 8) ;
		return ($iVersion >= 20030210) ;
	}
	else if ( strpos($sAgent, 'Opera/') !== false )