add code for making required fields in php

Please help I am looking for a code and how to put it into my code listed below for making (Last name, First name, Phone, email required) if anyone can can help thank you all.


<?php



/* Subject and Email Variables */



$emailSubject = 'Online Reservations';

$WebMaster = 'anyone@gmail.com';



/* Gathering Data Variables */



$Last = $_POST['Last'];

$First = $_POST['First'];

$email = $_POST['email'];

$phone = $_POST['phone'];

$From = $_POST['From'];

$To = $_POST['To'];

$Pickupdate = $_POST['Pickupdate'];

$pickuptime = $_POST['pickuptime'];

$Numberofpeople = $_POST['Numberofpeople'];

$adate = $_POST['adate'];

$airline = $_POST['airline'];

$flight = $_POST['flight'];

$arrival = $_POST['arrival'];

$ddate = $_POST['ddate'];

$dairline = $_POST['dairline'];

$dnumber = $_POST['dnumber'];

$dtime = $_POST['dtime'];

$OtherLocation = $_POST['OtherLocation'];

$UniversalStudios = $_POST['UniversalStudios'];

$SeaWorld = $_POST['SeaWorld'];

$MagicKingdom = $_POST['MagicKingdom'];

$EpcotCenter = $_POST['EpcotCenter'];

$AnimalKingdom = $_POST['AnimalKingdom'];

$HollywoodStudios = $_POST['HollywoodStudios'];

$CirqueDuSoleil = $_POST['CirqueDuSoleil'];

$DowntownDisney = $_POST['DowntownDisney'];

$BuschGardens = $_POST['BuschGardens'];

$SpecialRequirements = $_POST['SpecialRequirements'];

$pickupaddress = $_POST['pickupaddress'];



$body = <<<EOD



Last Name: $Last

First Name: $First

E-Mail: $email

Phone Number: $phone

Transportation From: $From

Transportation To: $To

Pickup date: $Pickupdate

Pickup Time: $pickuptime

Number of People: $Numberofpeople

Flight Arrival Date: $adate

Arriving Airline: $airline

Arriving Flight Number: $flight

Flight Arrival time: $arrival

Flight Departure Date: $ddate

Departing Airline: $dairline

Departing Flight Number: $dnumber

Flight Departure Time: $dtime

Universal Studios: $UniversalStudios

Sea World: $SeaWorld

Magic Kingdom: $MagicKingdom

Epcot Center: $EpcotCenter

Animal Kingdom: $AnimalKingdom

Hollywood Studios: $HollywoodStudios

Cirque Du Soleil: $CirqueDuSoleil

Downtown Disney: $DowntownDisney

Busch Gardens: $BuschGardens

Other Location: $Other

Special Requirements: $SpecialRequirements

Pickup Address: $pickupaddress

EOD;



$headers = "From: $email\r\n";

$headers = "Content-type: text/html\r\n";

$success = mail($WebMaster, $emailSubject, $body, $headers);



header('Location: confirmation.html');

exit();

 

It's fairly easy. All you need to do is write an if statement for each one that you want required.

if ($lastname == '') {
//Last name was empty, and it is required
die('Last name is required. <a href="javascript:history.back();">Go back</a>');
}

Or something like that. It's really up to you how you want to handle a missing variable.

 

or a bit cleaner/easier


if($firstname=="" || $lastname=="" || $email=="" ){
die("<b><center>Please enter all required fields - <a href='form.php'>Back</a></center></b>");
} else {
echo "thanks $firstname $lastname for entering your email, $email";
}

 

Also, instead of doing $this = $_POST['that']; for everything.. you could also do
extract($_POST);

which would automatically assign all of the $_POST variables to itself so $_POST['this'] will automatically because $this

you just have to make sure that it does not override any other variables.. it can also technically be a security issue, but it does save a lot of time and a lot of code.

You could even loop through the $_POST if everything is required, and echo out the errors that way..

so instead of

if($firstname=="" || $lastname=="" || $email=="" ){
die("<b><center>Please enter all required fields - <a href='form.php'>Back</a></center></b>");
} else {
echo "thanks $firstname $lastname for entering your email, $email";
}

you can do

$error="";
foreach ($_POST AS $var=>$val)
{
if (is_empty($val)){$error.="$var is required.<br>";}
//or if($val==""){$error.="$var is required.<br>";}
}

if ($error!=""){echo $error;}

and you could add more conditionals as needed to exclude variables or add formatting things..