Validation

aub · October 6, 2014

I need to validate first name, last name, street, suburb, postcode, email, status and date of birth.

I tried to do this validation but gave me heaps of error and I messed up more.

if (empty($firstname)) {$errors[] =" First Name Can not be Empty <br> ";}
if (empty($lastname)) {$errors[] =" Last Name Can not be Empty <br> ";}
if (empty($street)) {$errors[] =" Street Can not be Empty <br> ";}
if (empty($suburb)) {$errors[] =" Suburb Can not be Empty <br> ";}
if (empty($postcode)) {$errors[] =" Postcode Can not be Empty <br> ";}
//    elseif (!is_numeric($postcode)) {$errors[] =" Postcode must be numeric ";}
    elseif(!preg_match("/\^\(\[0\-9\]\{5\}\(\[\-\\s\]\?\[0\-9\]\{4\}\)\?\)\$/", $postcode))  {$errors[] =" Please enter a valid post number <br> ";}
if( !preg_match("/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$/i", $myemail) )  {$errors[] =" You have entered and invalid email address <br> ";}
if (empty($DOB)) {$errors[] =" Date only <br> ";}

This is my full PHP/MySQL code:

<html>
<head>
<style>
body
{
background-color:#d0e4fe;
}
h1
{
color:orange;
text-align:center;
}
p
{
font-family:"Times New Roman";
font-size:20px;
}
table,th,td
{
border:1px solid black;
}
table
{
width:90%;
}
th
{
height:40px;
}

</style>
</head>

<body>

<h1>All Students Information</h1>

</body>
</html>



<?php

 function renderForm($first, $last, $st, $sub, $pcode, $em, $sta, $dofb, $error)
 {
 ?>
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 <html>
 <head>
 <title>Add Student</title>
 </head>
 <body>
 <?php 

 if ($error != '')
 {
 echo '<div style="padding:4px; border:1px solid red; color:red;">'.$error.'</div>';
 }
 echo "<p><b>Add new student details</b></p>";
 ?> 
 <form action="" method="post">
 <div>
 <strong>First name: </strong> <input type="text" name="FNAME" value="<?php echo $first; ?>" /><br/>
 <strong>Last name: </strong> <input type="text" name="LNAME" value="<?php echo $last; ?>" /><br/>
 <strong>Street: </strong> <input type="text" name="STREET" value="<?php echo $st; ?>" /><br/>
 <strong>Suburb: </strong> <input type="text" name="SUBURB" value="<?php echo $sub; ?>" /><br/>
 <strong>Postcode: </strong> <input type="text" name="POSTCODE" value="<?php echo $pcode; ?>" /><br/>
 <strong>Email: </strong> <input type="text" name="EMAIL" value="<?php echo $em; ?>" /><br/> 
 <strong>Status: </strong> <input type="text" name="STATUS" value="<?php echo $sta; ?>" /><br/>
 <strong>Date of Birth: </strong> <input type="text" name="DOB" value="<?php echo $dofb; ?>" /><br/>
 <p>Required Field</p>
 <input type="submit" name="submit" value="Submit">
 </div>
 </form> 
 <p><a href="view.php">Update & delete students</a></p>
 </body>
 </html>
 <?php 
 }
 
 include('dbconnect.php');

 if (isset($_POST['submit']))
 { 
 $firstname = mysql_real_escape_string(htmlspecialchars($_POST['FNAME']));
 $lastname = mysql_real_escape_string(htmlspecialchars($_POST['LNAME']));
 $street = mysql_real_escape_string(htmlspecialchars($_POST['STREET']));
 $suburb = mysql_real_escape_string(htmlspecialchars($_POST['SUBURB']));
 $postcode = mysql_real_escape_string(htmlspecialchars($_POST['POSTCODE']));
 $email = mysql_real_escape_string(htmlspecialchars($_POST['EMAIL']));
 $status = mysql_real_escape_string(htmlspecialchars($_POST['STATUS']));
 $dob = mysql_real_escape_string(htmlspecialchars($_POST['DOB']));
 
 if ($firstname == '' || $lastname == '' || $street == '' || $suburb == '' || $postcode == '' || $email == '' || $status == '' || $dob == '')
 {

 $error = 'Your field is empty';
 
 renderForm($firstname, $lastname, $street, $suburb, $postcode, $email, $status, $dob, $error);
 }
 else
 {

 mysql_query("INSERT student SET FNAME='$firstname', LNAME='$lastname', STREET='$street', SUBURB='$suburb', POSTCODE='$postcode', EMAIL='$email', STATUS='$status', DOB='$dob' ")
 or die(mysql_error()); 

 header("Location: view.php"); 
 }
 }
 else

 {
 renderForm('','','','','','','','','');
 }
?>

For easy view, click the link below.
http://codepaste.net/3usepx

Your help would be greatly appreciated!
Thank you.

cyberRobot · October 6, 2014

What kind of errors are you seeing? Note that it will help to see the exact messages.

Side note: In case you're not aware, PHP has a built-in function for validating email addresses here:

http://php.net/manual/en/filter.examples.validation.php

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