PHP多重判断删除文件函数_PHP教程

<!--?
function delete_file($file) 
{ 
    if (file_exists($file)) 
    { 
        $delete = chmod ($file, 0777); 
        $delete = unlink($file); 
        if(file_exists($file)) 
        { 
            $filesys = eregi_replace("/","\",$file); 
            $delete = system("del $filesys"); 
            clearstatcache(); 
            if(file_exists($file)) 
            { 
                $delete = chmod ($file, 0777); 
                $delete = unlink($file); 
                $delete = system("del $filesys"); 
            } 
        } 
        clearstatcache(); 
        if(file_exists($file)) 
        { 
            return 'Delete Faile         :        <font color='#ff0000'-->'.$file.'
'; 
        } 
        else 
        { 
            return 'Delete Successs        :        '.$file.'
'; 
        } 
    } 
    else 
    { 
        return 'Delete Successs        :        '.$file.'
'; 
    } 
}
?>