Latest LQ Deal: Linux Power User Bundle
Go Back > Forums > Non-*NIX Forums > Programming
User Name
Programming This forum is for all programming questions.
The question does not have to be directly related to Linux and any language is fair game.


  Search this Thread
Old 09-10-2009, 06:48 AM   #1
Senior Member
Registered: Oct 2001
Location: Bristol UK
Distribution: Slackware Ubuntu
Posts: 1,053

Rep: Reputation: 42
Smile Form field validation using php

I am going in circles and banging my poor head against walls. I want to validate a web form using PHP. I spent ages confusing myself with client side scripting and realised until I worked out it is not what I want. My problem is that now I am looking at PHP and everything is mixed up in my brain. I need to point out that PHP is very new to me!! This is what I already have: 1 An html page with my form on it. 2 a php page which emails the contents of the form to me. The above works well. For the sake of clarity, here are my pages (cut down to the essentials where appropriate): My html form
first name surname
email &nbsp
home phone


work phone

I have read and understood your terms and conditions

my php script (regform.php)
$receiver = 'me@email'; $subject = 'New registration'; #$message = 'This is a new registration.'; $surname = $_POST['surname']; $firstname = $_POST['firstname']; $address = $_POST['address']; $email = $_POST['email']; $homeph = $_POST['homeph']; $mobileph = $_POST['mobileph']; $workph = $_POST['workph']; $time = $_POST['time']; #from here $oldaddress = $_POST['oldaddress']; $DOB = $_POST['DOB']; $elect = $_POST['elect']; $job = $_POST['job']; $salary = $_POST['salary']; $employer = $_POST['employer']; $benefit = $_POST['benefit']; $smoke = $_POST['smoke']; $claim = $_POST['claim']; $children = $_POST['children']; $children2 = $_POST['children2']; $pets = $_POST['pets']; $pets2 = $_POST['pets2']; $require = $_POST['require']; $terms = $_POST['terms']; $rooms = $_POST['rooms']; $body = "first name:$firstname\n surname:$surname\n DOB:$DOB\n email:$email\n home phone:$homeph\n mobile phone:$mobileph\n work phone:$workph\n address:\n$address\n time at this address:$time\n previous address:$oldaddress\n electoral register:$elect\n employment:$job\n employer:$employer\n salary:$salary\n benefit claim:$benefit\n future benefit:$claim\n children:$children\n ages:$children2\n pets:$pet\n pet type:$pets2\n other requirements:$require\n terms:$terms"; $headers = 'From: email' . "\r\n" . 'Reply-To: email "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($receiver, $subject, $body, $headers, "From: $firstname $surname \r\n" . "Reply-To: $firstname $surname class="inlineimg" />;
You can see there are many more form fields than I have shown in my example html form above. What I want is that the following fields have to be filled : 1 mobileph 2 email 3 terms (checkbox) I would like the user to be asked to fill the form in properly if any/all of the 3 fields have not been filled in. I imagine I need some php in the html page and some more in the php page. I am certainly not asking any one to do this for me but I am really confused. I have googled and copied and pasted and edited for 6 hours and I am lost. What I want is a very simple and clear example of the code needed. Sorry if I sound as if I can't search properly on Google: in this case I clearly can't!!!

Last edited by esteeven; 09-10-2009 at 07:22 AM. Reason: it's a mess!!! my code won't show up!
Old 09-10-2009, 07:23 AM   #2
Senior Member
Registered: Oct 2001
Location: Bristol UK
Distribution: Slackware Ubuntu
Posts: 1,053

Original Poster
Rep: Reputation: 42
I am probably missing the obvious but I am having real problems posting this!! I am sorry it looks so horrible.
Old 09-10-2009, 03:15 PM   #3
Senior Member
Registered: Sep 2003
Posts: 3,171

Rep: Reputation: 115Reputation: 115
Your php output is practically unreadable. It appears to be moving variables from a REQUEST into local storage, then building an email using those local variables, then sending the email using the mail() command.

This is stock stuff.

I guess I'm confused; you want to validate and enforce certain fields? And kick it back to them if those fields are not filled in properly?

Like this, generally:

The name of this script, for our purposes, is myscript.php


allow_send = 0;
formerror = 0;
$receiver = 'me@email'; $subject = 'New registration'; #$message = 'This is a new registration.'; $surname = $_POST['surname']; $firstname = $_POST['firstname']; $address = $_POST['address']; $email = $_POST['email']; $homeph = $_POST['homeph']; $mobileph = $_POST['mobileph']; $workph = $_POST['workph']; $time = $_POST['time']; #from here $oldaddress = $_POST['oldaddress']; $DOB = $_POST['DOB']; $elect = $_POST['elect']; $job = $_POST['job']; $salary = $_POST['salary']; $employer = $_POST['employer']; $benefit = $_POST['benefit']; $smoke = $_POST['smoke']; $claim = $_POST['claim']; $children = $_POST['children']; $children2 = $_POST['children2']; $pets = $_POST['pets']; $pets2 = $_POST['pets2']; $require = $_POST['require']; $terms = $_POST['terms']; $rooms = $_POST['rooms'];

    validate anything you want to validate, and implement security to prevent your form being used as a spam relay
         formerror = 0;
         allow_send = 1;
    else formerror = 1;
if(allow_send == 1)
    echo "the message was sent<br/>";
} else {
<form action = "myscript.php" method="POST">
if(formerror == 1) {
    echo "there are errors in the form.  Please correct them.<br/>

html blah blah, with values put in textboxes etc
<?php } ?>
In such a form, when marking up errors, I'll usually change the fonts on the lines that have the problems into red so that the user can easily see what I want fixed..

Last edited by jiml8; 09-10-2009 at 05:03 PM.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
php question, how do I get a return from a field within a field? cherrington Programming 11 04-29-2009 02:27 AM
Default value in a php variable if a form-field is empty? MheAd Programming 2 12-19-2008 07:21 AM
form field hints Joachim Schrader Linux - Newbie 2 09-30-2008 04:38 PM
multiple-select form validation with javascript baikonur Programming 7 10-12-2007 08:28 AM
Form validation problem (PHP+MySQL) linuxfond Programming 13 09-08-2003 01:11 PM > Forums > Non-*NIX Forums > Programming

All times are GMT -5. The time now is 05:27 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration