Ewerton

    $file  = $_FILES['file'];
    $pasta = 'img'.'/'.'slider';
    $path = $file['tmp_name'];
    $new_path = $pasta."/".$file['name'];
    $nome = $file['name'];
    $arquivo = $_FILES['file']['tmp_name'];
    $uploadedfile = $file['tmp_name'];
    $src = imagecreatefromjpeg($uploadedfile);
    list($width,$height)=getimagesize($uploadedfile);
    $newwidth=480;
    $newheight=($height/$width)*480;
    $tmp=imagecreatetruecolor($newwidth,$newheight);
    imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);
    $nome_novo = explode('.',$_FILES['file']['name']);
    $nome_novo = $nome_novo[0];
    $nome_novo = $nome_novo.rand().'.jpg';
    $filename  = "../../$pasta/".$nome_novo;
    imagejpeg($tmp,$filename,80);
    imagedestroy($src);
    imagedestroy($tmp);