Form Validation Using Functions .

let's say I have a mutli-page form. I use functions to validate each form field individually. So I have:


foreach ($_REQUEST as $Key => $Value){

($Key === "surname")? $surname = check_surname($_REQUEST['surname']) : ''
($Key === "name")? $name = check_name($_REQUEST['name']) : ''


in the functions I assign the value of the request to a session if it validates (to carry it across the form pages) and unset the session if it doesn't validate (in case it's ok before and then changed). If all the form field have a corresponding session my form was correctly field so I move on tho the next step.


Form Validation With Functions?

I am trying to make a very simple form validation function. I currently have the following

function formValidate($field, $msg) {
if (empty($_POST['$field'])) {
$errors[] = $msg;
} else {


When I run the script and enter nothing into the $_POST['form'] field it still executes an empty record into the database.

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Form Validation - Finding Duplicates: Regular Expressions Or String Functions?

I'm trying to figure out the most efficient method for taking the
first character in a string (which will be a number), and use
it as a variable to check to see if the other numbers in the string
match that first number. I'm using this code for form validation of a
telephone number.

Previous records from the past few months show that when someone is
just messing around on one of our forms (to waste our time), they type
in a phone number like "555-555-5555" or "111-222-3333". Our Web forms
have three text boxes for each telephone number:

homephone1 = area code (3 digits)
homephone2 = prefix (3 digits)
homephone3 = suffix (4 digits)

businessphone1 = area code (3 digits)
businessphone2 = prefix (3 digits)
businessphone3 = suffix (4 digits)

My plan is to check for this pattern, then if I find it, just redirect
the user to the thank you page so they'll think the form was
processed, when it actually wasn't.

As we find additional patterns that people use for malicious data,
I'll enter those as well (e.g., 123-123-1234)

Also, if you see any tutorials, or articles that talk about "real
world" form validation please point me to them. I've been looking for
references for form-based validation logic that takes real world dummy
data into account, but haven't found much.

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Now I have the error messages going where i want them to but I cant figure out how to combine validation for different fields. The form due to how I now have it set up as error_msg, error_msg1 and error_msg2 will only reject the form if one field is not filled in. I tried to use the pipe to combine them but had no luck. Will i have to set a different complete validation for each field. Or can i use an array (error_msg = 'error messager here' error_msg1 = 'error message one here') somthing like that. Can you use multiple words in an array? Everything i see on line and in my books show one word one=two sort of This is the code I now have ...

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I want to use some basic php validation (regular expressions) on, how do you go about doing it? I have just general text input, usernames, passwords and date to validate. I would also like to know how to check for empty input boxes. I have looked on the interenet for this stuff but I haven't found any good tutorials.

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Where Should Validation Functions Be Stored?

I'm using a PHP MVC Framework, and I've been just lumping all my validation functions in a helper class which get called when I need them.

However, isn't the Model for logic about working with data, not exclusively databases? Would it make more sense to put the validation functions in one of my models?

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Test All Validation Functions?

I already test all validation functions, it is about 80 % working. The rest is my problem about duplicate user name or email.

You can try my demo:

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Is there a way to prevent a form from proceeding to the post-validation if an error occured in the "normal" validation?

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Currently after my form has passed validation it forwards to an html page.I would like to have one last step that pulls reCaptcha and when reCaptcha has been passed only then is the registration details of the user sent to my database and user forwarded to what ever page I choose. Here is my javascript and ajax. The submit.php is a file that holds all my validation rules. I think I now have to have a file that holds my captcha and use ajax to get that file or maybe there is some better way. I'm still learning.

$('#fhjoinForm').submit(function(e) {


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Here is what I have right now.

function submit_form()


And for testing, the view simply contains:

echo validation_errors();

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I post this solution to a form validation and redirect as an addition to a comment page written with dreamweaver. Unfortunately Dreamweaver does not provide server-side validation for php. You're expected to purchase an extension. My problem I have a comments page with a comment form. I wanted the comment input to a database if ok but if a user tried to input code or a link, I wanted to redirect them back to the form page without their comment input to the database. I also needed to work out where in the Dreamweaver written code to place my validation and redirect.

$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
$editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "comments"))
$comment = htmlentities($_POST['comment']);
function check_field1($comment)
if (preg_match("/</", $comment))

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I am trying to set up validation on a simple contact form that is created using the form helper. No validation at all occurs. What is wrong? In the code below, the good keyword always shows, regardless of what is entered into the form, and the saved values set via set_value are never shown.

// Contact
function contact() {
$data['pageTitle'] = "Contact";
$data['bodyId'] = "contact";

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How to add an error message to Zend Form element after the form was already validated? I'm trying to add error mesages I get from Zend_Auth (now I'm displaying them using flashMessenger). I tried something like this:

$form->getElement('username')->addErrorMessage('my message');

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I have a post a comment code that validates input but submits on page refresh. so i added session unique id to the form validation. but it won't let me post on any of the detail.php pages after i have posted on one(detail.php is a dynamic page that gets the records from my db) for example [URL]... this allows me to post on the article on 78 [URL]... doesn't allow me. on my form page i already have a variable that gets vtopic $p_name = $_GET['vtopic'] and puts in my db. So is there a way so that the session nows the $p_name so that it stop me commenting on other articles on the detail.php todo is the hidden field, auto increment.


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I'm doin a Web Programming Course and we were asked to do a simple contact for. for some reason it's not running. Can someone tell me why? here is the code:

$NAME = $_POST ['name'];
$EMAIL = $_POST ['email'];
$SUBJECT = $_POST ['_subject'];
$MESSAGE = $_POST ['message'];
include 'config.php'

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This is my zend form code

class Form_Bookmark extends Zend_Form{
function init(){


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$(document).ready(function() {

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include("application.php");     <-----   (db connect)
$DOC_TITLE = "Catalyst Series Management";

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I have a validation form that must behave differently based on the results of a PHP validation check. I have a post command at the top of my form that calls itself. I don't leave the form when performing the validation check on the values that were entered into the form, I simply repost the form to perform the PHP validation. If any of the values that have been entered into the form are incorrect, I display a warning message on the screen for the fields that are in error. This works fine.

However, if all the values that have been entered are "correct". I want the form to open up "another" form without reposting to this same form. So, after I perform the first post that validates the inputs into the form (by calling itself) how can I redirect the user to another form if the validation checks are all successful? What is the syntax for doing this?

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you would need to use Javascript for form validation, since the form is client side, PHP doesn't have the capabilities for validating forms to the extremes you'd need.

it isn't all that difficult really, how well do you know Javascript?. if not well enough, contact me and i'll see what i can do.

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I have a form to process in PHP, and I want to validate all the fields. only way that I can think of is use a if statement for each field, is there a better way than this? at the moment my code is just swamped with if statements...

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Can someone suggest a method or point me in the right direction for validating a simple form using php.

I have a form which only has two significant fields - a drop down with three choices, and a dropdown with five choices - and I want the user to have chosen the correct value from the first dropdown before allowing the form to be submitted : ideally, on choosing the incorrect value, the page will display "incorrect please try again" or something along those lines.

the form is like this :

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I have a page now wich contains a form below that form are a couple of tables wich contain some data from the db. With the form you can add new stuff to that db. What I wanna do is make the form do self submit (no prob here)

But now Im stuck with the way the script is going to work I want to validate the form and report back in text (on the same page) which fields were missing. If eerything is ok insert into db and just show the page.

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im trying to create a php page wherein i could check the input without going to the next page and do the checking there and go back to the inout page if the user didn't enter the rght info or if he missed something. i googled and found something but it's so complicated that when i tried and tested it, it doesn't work.

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in my project i have 10 different forms and each form has got more than 10 fields. Code:

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if(isset($_POST['name']))//name field is set
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$name = trim(mysql_real_escape_string($_POST['name']));
else {
// $n is not valid
echo "fill your name properly.";
} }
if(empty($_POST['name'])) {
//name not set
echo "left the name field blank.";
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Form Validation.

I am trying to validate a string for just numbers and letters... I can't seem to get it working. Not much of a fan of regex.. 0-9, A-Z, a-z


//This doesn't work....

if (eregi("/^[a-z0-9]+$/i", "test")) {
echo "Valid";}
else {
echo "Invalid";}?>

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I read somewhere that it's a not faster to validate forms by with the client side (JS) and that PHP form validation should be used as backup. So I found some JS code to validate the form. Now, how would I proceed to validate the form with PHP in the case that a user turns off JS?

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Im in the midst of creating a secure signin script which brings me to two questions I have.

1. I want to filter out blank spaces from the login and password fields. Im very unfamiliar with regular expressions, so I went out and found the below script on the web:

function no_specialchars($field1)
   if (!eregi("[a-zA-Z0-9]+",$field1))
      $_SESSION['error'] = "The password or username fields should only contain alphanumerical characters or hyphens and underscores.";
      header('Location: reg_signin.html');

This function seems to do the trick when I try to signin with most special characters (although not all of them?!) and only spaces, however it still lets me pass when I put spaces before, in between or after the text string. What I want is to filter out any spaces and any special characters except for hyphens and underscores.

2. My second question would bring me to the handling of an error caught by the filter. Im using sessions where the session key 'error' is created once the filter finds a problem. This session data is then kept and displayed at the original signin form page. Is this the ideal way to do it or should I maybe put url variables to the redirect link such as header('Location: reg_signin.html?error=1'); and then read the user the error according to the error GET value?

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Okay i know i have been going on and on about this but its driving me nuts and i have confused a lot of people so i am going to paste code and comments. Hopefully ill get some help

I have been working on these couple of scripts for a while. The first one you enter the number of textfields to create to insert images to the table. That actual field is validated (this works!) then it passes that number to second script which creates and array according to that number it got (this works as well !).

Now before being able to submit the data finally (in page 2) i want to make sure that first there are no duplicates the fields are not empty (both dont work !). Some how with both or seperatley validations when i choose to submit i get the "Java Script Prompt" and when i click the OK button on the "prompt window" the page disappears !. Obviously when u (press back button) the fields disappear too since the arrays gone.

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Hello, I am pretty new to PHP. I have set up this submit form which passes on many (around 30) variables, I want to make sure that all the forms are filled out and none of them are empty. Is there any way that I can use HTTP_GET_VARS [] so if any of the variables passed on are empty then the user will have to fill out the form again.

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I am using form validations for different fields.
One of them for City as -

if(($_GET['app_city']) == ''){
$cityError = "Invalid or missing city";
$error++; }
$app_city = trim(stripcslashes($_GET['app_city'])) ;

If I typed City as - "My City",

If the validation fails, it shows City as - "My" instead.
Does not consider both the words.

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Im trying to optimise and make this form/page as best as it can be.

Do you think it would be a better idea to continue using JS or use JS
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I'd like to use a captcha form validation on my web form, but I'm not sure if I'll be able to with my current set up.

I have a form, which when submitted, 'posts' the data to a cgi script (formmail) and then redirects the user to a thank-you page.

However, a php captcha seems to do everything within one php file - you hit submit and it reloads the php file while validating the captcha. Is there a way to get a script to validate the captcha and if valid, send the data to the cgi script and then redirect the user to the thank you page?

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I have form that once you have pressed the submit button will validate 3 * fields to check if they have been entered in correctly. If the have errors it will not process the form to email and instead display the errors and tell the user to amend the error fields before it can be processed.

My problem is that i have tested the validation and works to a certain standard my only PROBLEM is that if there is an error in the form it wipes the whole form clear so ultimately the user will lose everything they have entered.

I do not want this happening, much like other forms on websites i have used it still displays the form as you entered it and so you can ammend the error fields and start again making sure everything is correct and processed properly. PHP Code:

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I have a form for uploading documents and inserting the data into a mysql
db. I would like to validate the form. I have tried a couple of Javascript
form validation functions, but it appears that the data goes straight to the
processing page, rather than the javascript seeing if data is missing and
popping up an alert. I thought it may be because much of the form is
populated with data from the db (lists, etc.), but when I leave out data in
a simple textbox, it still doesn't see it. I've tried a couple of different
things, that didn't work, so I simplified and tried to address one form
element at the simplest level at a time - still no luck. Is there something
special I need to do to make the Javascript work before the PHP? Is there a
good way to do client side validation with PHP?

Here's most of the code:

function ValidateForm(upload)
alert('You have not entered a title!')
return false;

return true;

NOTE: queries are here - they fill some of the list boxes

<form enctype="multipart/form-data" action="upload.php" name="upload"
id="upload" method="post" onsubmit="javascript:return ValidateForm(upload)">
<input name="uploadfile" type="hidden" value="uploadfile" />
<!--//Create the file and description inputs. -->

<table width="100%" border="0" cellspacing="5" cellpadding="0">
<snip - took out a different category listing>
<td <fieldset>
<legend><a name="Standard" id="Standard"></a>Standard Document</legend>
<br />Complete this section <strong>only</strongif document/link is NOT
a Tool.<br /><br />
<snip - took out the generated category/subcategory lists>
<legend>Document Information</legend>
<strong>Document Title</strong>:
<input name="title" id="title" type="text" size="40"
maxlength="50" />
<br />
(Required - no more than 50 characters)<br />
<br />
<strong>Description:</strong>(Required -150 characters) <br />
<textarea name="description" cols="30" rows="5"></textarea>
<br />

<legend>Project Data</legend>
<strong>Primary Project:</strong>
<select name="project" id="project">
<option value="value">Select a project...</option>
do {
<option value="<?php echo $row_projects['projID']?>"><?php echo
} while ($row_projects = mysql_fetch_assoc($projects));
$rows = mysql_num_rows($projects);
if($rows 0) {
mysql_data_seek($projects, 0);
$row_projects = mysql_fetch_assoc($projects);
<snip- took out another listbox>
<legend>Document to Upload</legend>Upload a document from your computer.
<input type="file" name="fileupload" id="fileupload"/>
<div align="center">
<input type="submit" name="submit" value="Submit" />

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