php中的表单验证问题？

Question

I have a form with several fields and with 4 radio buttons. Based on this radio button click, the form has to be validated. All the fields in the form need not be validated.

Check this link, the similar thing I want:

https://stackoverflow.com/questions/30396119/i-have-issue-in-php-validation-for-nested-if-else-condition

The code i tried:

<?php
        $guestname="";$validguestname="";
    $guestno= "";$validguestno="";
    $nochild= 0;$validnochild="";
    $noadults=0;$validnoadults="";
    $infants =0;$validinfants="";
    $noofperson ="";$validnoofperson="";
    $check_in="";$validdate1="";
    $check_out="";$validdate2="";
    $noofnight = "";$validnoofnight="";
    $room_type="";$validroom_type="";
    $nfroom="";;$validnfroom="";
    $noofextrabed ="";$validnoofextrabed="";
    $roomarray="";$validroomarray="";
    $mealplan="";$validmealplan="";
    $rateperday ="";$validrateperday="";
    $rateperbed ="";$validrateperbed="";
    $total_amount ="";$validtotal_amount="";
    $advance   = "";$validadvance="";
    $balance   ="";$validbalance="";
    $receiptno ="";$validreceiptno="";
    $dateofremitance ="";$validdateofremitance="";
    $bankorcash="";$validbankorcash="";
    $bank_name="";$validbank_name="";
    $bookedby="";$validbookedby="";
    $paymentmode  ="";$validpaymentmode="";
    $bookingtype="";$validbookingtype="";
    $reservationstatus="";$validreservationstatus="";
    $book_by="" ;$validbook_by="";
    $agentname= "";$validagentname="";
    $agentphoneno="";$validagentphoneno="";
    $error_message="";$error_message1="";$error_message2="";
    $date3=date('Y-m-d');
   if(isset( $_POST['submit']))
   {            
    $guestname= $_POST['guest_name'];
    $bookingtype=$_POST['booking_type'];echo $bookingtype."helooo";
    $guestno= $_POST['guest_no'];
    $reservationstatus=$_POST['reservation_status'];
    $nochild= $_POST['no_child'];
    $book_by= $_POST['bookby'];
    $agentname= $_POST['bookbyother'];
    $agentphoneno= $_POST['phone1'];
    $noadults= $_POST['no_adults'];
    $infants = $_POST['no_infants'];
    $noofperson = $nochild+$noadults+$infants;
    $check_in=trim( $_POST['checkin']);
    $check_out=trim( $_POST['checkout']);
    $noofnight = $_POST['no_of_days'];
    $room_type= $_POST['roomtype'];
    $nfroom= $_POST['noofroom'];    
    $noofextrabed = $_POST['no_of_extra_bed'];
    $roomarray= $_POST["room_no"];
    $mealplan= $_POST['meal_plan'];
    $rateperday = $_POST['rp_day']; 
    $rateperbed   = $_POST['extrarate'];
    $total_amount =  $_POST['totalamount'];
    $advance   = $_POST['advance_amount'];
    $balance   = $_POST['val_username'];
    $receiptno = $_POST['receipt_no'];
    $dateofremitance = $_POST['date_remitance'];
    $bankorcash= $_POST['paymentmode'];
    $bank_name= $_POST['bankname'];
    $booking_date=date('y-m-d');
    $bookedby= $_POST['adminbooking'];
    $paymentmode  = $_POST['payment_mode'];
    $date1 = date('Y-m-d', strtotime($check_in));
    $date2 = date('Y-m-d', strtotime($check_out));
///1st condition///
    if($bookingtype=="direct" && $reservationstatus=="H" && other_conditions)
    {

        insert query;

    }
    ///2nd condition///
    else if($bookingtype=="direct" && $reservationstatus=="C" && othercondition for particular fields)
    {insert query;}
    ///3rd condition///
    else if($bookingtype=="agent" && $reservationstatus=="H" && $book_by=="other")
    {echo "agent anfd holding and other";}
    ///4th condition///
    else if($bookingtype=="agent" && $reservationstatus=="H" && $book_by!="other")
    {echo "agent anfd holding and not toher";}
    ///5th condition///
    else if($bookingtype=="agent" && $reservationstatus=="C" && $book_by=="other")
    {echo "agent anfd confirm and other";}
    ///6th condition///
    else if($bookingtype=="agent" && $reservationstatus=="C" && $book_by!="other")
    {echo "agent anfd confirm and not other";}
    //else condiition
    else
    {echo "choose ur option";}

Answer 1

From what I gather, your problem seems to be figuring out the full range of values that have been entered on the first. You can try one of two approaches.

1. Get your form values default options if they have not been entered by the user. As an example:

if (!empty($_POST['')) {
    $reservationstatus=$_POST['reservation_status'];
}
else {  
    $reservationstatus=false; 
}

then your following query will work:

if($bookingtype=="direct" && $reservationstatus=="H" && other_conditions)
{
    your_query_here();
}

1. Check explicitly for entered values, but this makes for a more complex check.

if( ((!empty($_POST['booking_type']) && 
    ($_POST['booking_type']=="direct") )  && 
    ((!empty($_POST['reservation_status']) && 
    ($_POST['reservation_status']=="H") )  && 
    other_conditions)
{
    your_query_here();
}