File: _class.browser.php

<?
class filebrowser{
    // constructor - clears the stat cache because of the functions used in displaying files and lists
    function filebrowser(){
        clearstatcache();
    }
    
    // takes a long path and resolves it down. Same as realpath, except it works even if the path
    // doesn't exist on this system
    function str2path($path_str){
    	$pwd=realpath($path_str);
    	$EX_FLAG=TRUE;
    	if(empty($pwd)){
    		$EX_FLAG=FALSE;
    		$pwd='';
    		$strArr=preg_split("/(\/)/",$path_str,-1,PREG_SPLIT_NO_EMPTY);
    		$pwdArr=array();
    		$j=0;
    		for($i=0;$i<count($strArr);$i++){
    			if($strArr[$i]!=".."){
    				if($strArr[$i]!="."){
    					$pwdArr[$j]=$strArr[$i];
    					$j++;
    				}
    			}else{
    				array_pop($pwdArr);
    				$j--;
    			}
    		}
    		$pStr=implode("/",$pwdArr);
    		$pwd=(strlen($pStr)>0) ? ("/".$pStr) : "/";
    	}
    	return $pwd;
    }

    // displays the directory listing, one item per line. will display according to the CSS style class name
    // passed as a second argument.
    function DisplayList($strpath,$css=''){
        global $PHP_SELF;
        $path=$this->str2path($strpath);
        if(is_file($path)){
            ereg("(.*)/[^/]*",$path,$match);
            $path=$match[1];
        }
    	$retVal="<h2>$path</h2>\n";
    	exec('ls -a '.$path,$result);
    	$retVal.="<p";
    	if($css) $retVal.=" class=\"$css\"";
    	$retVal.=">";
    	for($i=1;$i<count($result);$i++){
    		$tmp=$path."/".$result[$i];
    		if(is_dir($tmp)){
    			$tmp.="/";
    			$filestring="<a href=$PHP_SELF?path=$tmp>$result[$i]/</a><br>\n";
    		}else{
    			$filestring="$result[$i] (<a href=$PHP_SELF?view=1&path=$tmp>View</a>)<br>\n";
    		}
    
    		$retVal.=$filestring;
    	}
    	return $retVal."</p>";
    }

    // displays the contents of a file according to the CSS class name passed as a second argument.    
    function DisplayFile($strpath,$css=''){
 		$path=$this->str2path($strpath);
    	// if it's not a directory, lets see it (if we can)!
    	// WARNING!!! You won't want to display binary files in this way
		$fileresult=file($path);
		if(count($fileresult)>1){
			$retVal="<b>Contents of: $path</b><hr>\n<pre";
			if($css) $retVal.=" class=\"$css\"";
			$retVal.=">";
			for($i=0;$i<count($fileresult);$i++){
				$retVal.=htmlspecialchars($fileresult[$i]);
			}
			$retVal.="</pre>\n";
		}
		return $retVal;
   }
}
// end of class

// example
$system=new filebrowser();

if(!$path)
    $path = exec('pwd');
if($view)
    echo $system->DisplayFile($path);
echo $system->DisplayList($path);
?>