fputs(), chyba

<?
session_start();
if (session_is_registered("sizn")) {
  $p_p = $_POST['p_p'];
  $p_1 = $_POST['p_1'];
  $p_2 = $_POST['p_2'];
  $u_p = $_POST['u_p'];
  $u_1 = $_POST['u_1'];
  $u_2 = $_POST['u_2'];
  $s_p = $_POST['s_p'];
  $s_1 = $_POST['s_1'];
  $s_2 = $_POST['s_2'];
  $c_p = $_POST['c_p'];
  $c_1 = $_POST['c_1'];
  $c_2 = $_POST['c_2'];
  $pa_p = $_POST['pa_p'];
  $pa_1 = $_POST['pa_1'];
  $pa_2 = $_POST['pa_2'];
  $od = $_POST['od'];
  $do = $_POST['do'];
  if($p_p=="" || $p_1=="" || $p_2=="" || $u_p=="" || $u_1=="" || $u_2=="" || $s_p=="" || $s_1=="" || $s_2=="" || $c_p=="" || $c_1=="" || $c_2=="" || $pa_p=="" || $pa_1=="" || $pa_2=="" || $od=="" || $do=="") {
    header("location: jidelnicek.php?a=pr");  
  } else {
    $file = "./infos/jidla.php";
    fopen($file, "w");
    $fput="\$p_p = $p_p; \$p_1 = $p_1; \$p_2 = $p_2; \$u_p = $u_p; \$u_1 = $u_1; \$u_2 = $u_2; \$s_p = $s_p; \$s_1 = $s_1; \$s_2 = $s_2; \$c_p = $c_p; \$c_1 = $c_1; \$c_2 = $c_2; \$pa_p = $pa_p; \$pa_1 = $pa_1; \$pa_2 = $pa_2; \$od = $od; \$do = $do;";
  //echo $fput;
      FputS($file, $fput);
    }
  }
 else {
  header("location: index.php?a=r");
  }
?>