<?PHP
//Should file_writer take backups of files
define("WRITER_BACKUP", TRUE);

//Where should file_writer store backups
define("WRITER_RESTORE_DIR", "./restore");

//Should file_writer lock files while writing to them
define("WRITER_LOCK_FILES", TRUE);

class file_writer
    {
    public $files = array();
    
    function __construct()
        {
        
        }
        
    function write($file, $content)
        {
        $date = date("d-m-Y_his");
        //Copy the original file to the restore dir
        if(file_exists($file))
            {
			if(WRITER_BACKUP)
				{
				copy($file, WRITER_RESTORE_DIR."/".$date."_".$file);
				}
            }
            
        if(!isset($files[$file]))
            {    
            //Make the file handle
            $files[$file] = fopen($file, "w");
            if(WRITER_LOCK_FILES)
                {
                flock($files[$file], LOCK_EX);
                }
            }
            
        //Overwrite the file
        fwrite($files[$file], $content);
        }
        
    function append($file, $content)
        {
        $date = date("d-m-Y_his");
        //Copy the original file to the restore dir
        if(file_exists($file))
            {
            if(WRITER_BACKUP)
				{
				copy($file, WRITER_RESTORE_DIR."/".$date."_".$file);
				}
            }
        
        if(!isset($files[$file]))
            {    
            //Make the file handle
            $files[$file] = fopen($file, "a");
            if(WRITER_LOCK_FILES)
                {
                flock($files[$file], LOCK_EX);
                }
            }
            
        //Overwrite the file
        fwrite($files[$file], $content);
        }
        
    function __destruct()
        {
        foreach($this->files as $file)
            {
            fclose($file);
            }
        if(WRITER_LOCK_FILES)
            {
            foreach($this->files as $file)
                {
                flock($file, LOCK_EX);
                }
            }
        }
    }

?>