basic.php

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<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997, 1998, 1999, 2000, 2001, 2002, 2003 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license,      |
// | that is bundled with this package in the file LICENSE, and is        |
// | available at through the world-wide-web at                           |
// | http://www.php.net/license/2_02.txt.                                 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | [e-mail] so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: Wolfram Kriesing <[e-mail]>                      |
// +----------------------------------------------------------------------+
//  $Id: Basic.php,v 1.20 2003/04/04 18:16:31 cain Exp $

require_once 'HTML/Template/Xipe/Options.php';

/**
*   the default filter(s) i use and Xipe needs
*
*   @package    HTML_Template_Xipe
*   @access     public
*   @version    01/12/10
*   @author     Wolfram Kriesing <[e-mail]>
*/
class HTML_Template_Xipe_Filter_Basic extends HTML_Template_Xipe_Options
{
// i need the method setOption, that's why i extend myPEAR_Common

    /**
    *   for passing values to the class, i.e. like the delimiters
    *   @access private
    *   @var    array   $options    the options for initializing the filter class
    */
    var $options = array(   'delimiter'     => array(), // first value of the array is the begin delimiter, second the end delimiter
                            'autoBraces'    => true );  // we need to check this for some filters, since some depend on it or have to behave differently

    /**
    *   apply (almost) all filters available in this class
    *   thanks to hint from Alan Knowles
    *   i am only applying those filters which i think are useful in mostly every case
    *   i.e. applyHtmlEntites i am not applying since it would convert every output to html
    *   and that is not desired in every case
    *
    *   @version    02/05/22
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  the actual input string, to which the filters will be applied
    *   @param      int     the filter level
    *   @return     string  the resulting string
    */
    function allPrefilters( $input , $filterLevel )
    {
        if( $filterLevel > 8 )  // see Main.php for what the filter levels are supposed to do
        {
            $input = $this->removeHtmlComments($input);
            $input = $this->removeCStyleComments($input);
        }
        $input = $this->decodeHtmlEntities($input);
        $input = $this->addIfBeforeForeach($input);
        $input = $this->escapeShortTags($input);
        return $input;
    }

    /**
    *   see allPrefilters()
    *
    *   @see        allPrefilters()
    *   @version    02/05/22
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  the actual input string, to which the filters will be applied
    *   @param      int     the filter level
    *   @return     string  the resulting string
    */
    function allPostfilters( $input , $filterLevel )
    {
        if( $filterLevel > 9 )  // see Main.php for what the filter levels are supposed to do
        {
            $input = $this->removeEmptyLines($input);
            $input = $this->trimLines($input);
            $input = $this->optimizeHtmlCode($input);
        }
        // this is default since, it enables you to also use 'switch case' blocks
        // if we wouldnt optimize the php here then there would be spaces printed between switch and case
        // which php doesnt allow! (only with autoBraces of course)
        //  i.e.    {switch($which)} ....those spaces here bother php...
        //              {case 'this':}
        //
        // and its better to optimize it always anyway!
        $input = $this->optimizePhpTags($input);
        return $input;
    }

    /**
    *   remove unnecessary php-tags, looks for ? > only spaces here < ?php  and merges them
    *   but watch out might be dangerous, since it also does that on < ?=
    *   better dont use it as it is if u are not 100% sure it will work (u were warned :-) )
    *
    *   @version    01/12/07
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  $input  the original template code
    *   @return     string  the modified template
    */
    function optimizePhpTags($input)
    {                             
        // replace ' } ? > <spaces> < ?php' by '}' AND
        // replace ' { ? > <spaces> < ?php' by '}'
        // since the big number of php tags only takes up a lot of parsing by php
        // NOTE: the space before the $1 is important, since PHP freaks out with '< ?php}' it needs '< ?php }'
        $input = preg_replace( '/\s*({|})(\s*)\?>(\s*)<\?php/U' , ' $1' , $input ); //"

        return $input;
    }

    /**
    *   removes HTML comments, use as preFilter
    *
    *   @version    01/12/07
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  $input  the original template code
    *   @return     string  the modified template
    */
    function removeHtmlComments($input)
    {
        return preg_replace('/<!--.*-->/Us','',$input); //worked until now, that i had nested html comments, not cool, but may happen when using {%include ...%}
// gotta live with that for now :-( see manual, recursive patterns
/*       return preg_replace('/<!--((?>[^(<!--)(-->)])|(?R))*-->/Usx','',$input);*/
    }

    /**
    *   removes C-style comments, use as preFilter
    *   but dont remove it if it is inside an html/xml tag <...>
    *   and dont remove it when there is a colon in front, like for a url
    *
    *   @version    01/12/07
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  $input  the original template code
    *   @return     string  the modified template
    */
    function removeCStyleComments($input)
    {
/*        $input = preg_replace( '/\/\/.+\n/U',"\n",$input);  // remove '//' but only on one line
removes <!DOCTYPE ... //W3C// > too :-(

        $input = preg_replace( '/(([^<].+)'.   // dont remove lines where double slashes are inside a html/xml tag <..>
                                '|([^:]))'.     // dont remove if there is a colon in front of the //, this is a url
                                '\/\/.+'.       // find the actual //
                                '(.+[^>])'.     // that checks for the closing >
                                '\n/U',"\n",$input);  // remove '//' but only on one line
removes the entire line if there is a // also only at the end

 doesnt work properly on this ...
<script>
    // fuck comment
    ftp://fuckyou.com
    http://fuckyou.com
</script>
http://fuck it
<a href="http://www.home.de">home</a>
http://dhsfsk

but this works:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<a href="http://www.home.de">home</a>


*/                                          
        // remove // commments when they are at the beginning of the line or if there are only spaces before
        $input = preg_replace('~^\s*//.*$~Um','',$input);
                                           
        // watch out, that weird strings, like reg-exps dont fuck this up!
        $input = preg_replace('~/\*.+\*/~Us','',$input);  // remove /* */ on multiple lines too
        return $input;
    }

    /**
    *   removes empty lines, leave indention as they are (i need this filter in autoBrace as it is!!!)
    *
    *   @version    01/12/09
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  $input  the original template code
    *   @return     string  the modified template
    */
    function removeEmptyLines($input)
    {
        return preg_replace('/\n\s*\n/s',"\n",$input);
    }

    /**
    *   removes trailing spaces from lines
    *   use only as a POST-filter, if you are using 'autoBrace', since it needs the indention
    *
    *   @version    01/12/09
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  $input  the original template code
    *   @return     string  the modified template
    */
    function trimLines($input)
    {
        return preg_replace('/\n\s*/s',"\n",$input);
    }

    /**
    *   concatenates HTML tags which are spread over many lines
    *   removes spaces inbetween a > and a <
    *   removes new lines before > and />
    *   use only as a POST-filter, if you are using 'autoBrace', since it needs the indention
    *
    *   @version    01/12/16
    *   @author     Wolfram Kriesing <[e-mail]>
    *   @param      string  $input  the original template code
    *   @return     string  the modified template
    */
    function optimizeHtmlCode($input)
    {
// all those in here are in use, but not tested all the way, i.e. what happens with compares in JS/PHP using < or >"

        // make lines at least 100 characters long
// dont know hoe yet...
//        $input = preg_replace('/((.*)\n(.*)){100,}/Us','$2 $3',$input);

        // removes new lines before > and />
        // this only works for tags where there are no PHP tags inside :-(
        $input = preg_replace('/\n([\/>])/U','$1',$input);

        // concatenates HTML tags which are spread over many lines,
        // and replace spaces which are before and after the new line by one space only
        // this only works for tags where there are no PHP tags inside :-(
        $input = preg_replace('/<(.*)\n(.*)>/U','<$1 $2>',$input);