<?php

function tag_replace($u_tagsuch,$u_fileorig,$u_fileneu,$u_tagorig,$u_tagneu){

	$zeile_nr = 0;
	$buffer = array();
	if ($lfile = fopen($_GET['htmlfile'], 'r')){
		while (!feof ($lfile)){
			$zeile_nr++;
			$buffer[$zeile_nr] = trim(fgets ($lfile, 4096));
			if ($zeile_nr == $_GET['zeile']){
				errorlog('Zeile gefunden: '.$buffer[$zeile_nr]);
				$zbuffer = strpos($buffer[$zeile_nr],$u_tagsuch);
				errorlog('erstes Tag: '.substr($buffer[$zeile_nr],$zbuffer));
				for ($i=0;$i<$_GET['tagnr'];$i++){
					$zbuffer = strpos($buffer[$zeile_nr],$u_tagsuch,$zbuffer+1);
				}
				$zbuffer -= 2;
				errorlog('bin dort: '.substr($buffer[$zeile_nr],$zbuffer));
				$buffer1 = substr($buffer[$zeile_nr],0,$zbuffer);
				$buffer2 = substr($buffer[$zeile_nr],$zbuffer,strpos($buffer[$zeile_nr],'>',$zbuffer)-$zbuffer+1);
				$buffer3 = substr($buffer[$zeile_nr],strpos($buffer[$zeile_nr],'>',$zbuffer)+1);
				errorlog('alte Zeile: '.$buffer[$zeile_nr]);
				errorlog('Teil1: '.$buffer1);
				errorlog('Teil2: '.$buffer2);
				errorlog('Teil3: '.$buffer3);
				if ($u_tagorig != ''){
					if ($u_tagorig != $u_tagneu){
						$tagorig = '<!'.$u_tagorig.'=';
						$tagneu = '<!'.$u_tagneu.'=';
						$buffer2 = str_replace($tagorig,$tagneu,$buffer2);
					}
				}
				if ($u_fileorig == ''){
					$u_fileorig = '=';
					$u_fileneu = '='.$u_fileneu;
				}
				errorlog('Replace File orig :'.$u_fileorig);
				errorlog('Replace File neu  :'.$u_fileneu);
				$buffer2 = str_replace($u_fileorig,$u_fileneu,$buffer2);
				$buffer[$zeile_nr] = $buffer1.$buffer2.$buffer3;
				errorlog('Teil2 neu: '.$buffer2);
				errorlog('neue Zeile: '.$buffer[$zeile_nr]);
			}

		}
		fclose($lfile);
	}else{
		errorlog('Finde das file nicht: '.$_GET['htmlfile']);
	}
	return $buffer;
}


	errorlog('Starte Verarbeitung - replace.php');

//				'&htmlfile='+IMG_File_to_Edit+
//				'&imgfileneu='+IMG_File_Name[u_i]+
//				'&imgfileorig='+IMG_Originales_Imgfile+
//				'&tagsuch=img'+
//				'&tagneu='+IMG_Aktives_Tag+
//				'&tagorig='+IMG_Origniales_Tag+
//				'&zeile='+IMG_Zeile+
//				'&tagnr='+IMG_Tagnr;

// Das Tagsuch wird benötigt, da z.B.: img und img0-img9 existiert, das Grundtag aber img heisst


	errorlog('Eingabeparameter:');
	errorlog('htmlfile...: '.$_GET['htmlfile']);
	errorlog('tagsuch....: '.$_GET['tagsuch']);
	errorlog('zeile......: '.$_GET['zeile']);
	errorlog('tagnr......: '.$_GET['tagnr']);


	switch($_GET['tagsuch']){
		case 'img':
			errorlog('imgfileneu.: '.$_GET['imgfileneu']);
			errorlog('imgfileorig: '.$_GET['imgfileorig']);
			errorlog('tagorig....: '.$_GET['tagorig']);
			errorlog('tagneu.....: '.$_GET['tagneu']);
			$buffer = tag_replace($_GET['tagsuch'],$_GET['imgfileorig'],$_GET['imgfileneu'],$_GET['tagorig'],$_GET['tagneu']);
			break;
		case 'rtf':
			errorlog('rtffileneu.: '.$_GET['rtffileneu']);
			errorlog('rtffileorig: '.$_GET['rtffileorig']);
			$buffer = tag_replace($_GET['tagsuch'],$_GET['rtffileorig'],$_GET['rtffileneu'],'','');
			break;
		case 'xml':
			errorlog('xmlfileneu.: '.$_GET['xmlfileneu']);
			errorlog('xmlfileorig: '.$_GET['xmlfileorig']);
			$buffer = tag_replace($_GET['tagsuch'],$_GET['xmlfileorig'],$_GET['xmlfileneu'],'','');
			break;
		default:
			errorlog('****');
			errorlog('**** Unbekannter Typ ***'.$_GET['typ']);
			errorlog('****');
			return;
	}

	errorlog('Schreibe File: '.$_GET['htmlfile']);
	if ($lfile = fopen($_GET['htmlfile'], 'w')){
		fwrite($lfile,implode("\n",$buffer));
		fclose($lfile);
	}else{
		errorlog('Offenen zm Schreiben funtkionierte nicht: '.$_GET['htmlfile']);
	}

	errorlog('Beende Verarbeitung - replace.php');

?>