<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Form Validation</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<?
function error_bool($error, $field) {
if($error[$field]) {
print("<td style=color:red>");
}
else {
print("<td>");
}
}
function show_form() {
global $HTTP_POST_VARS, $print_again, $error;
?>
<form action="" method="post">
<table width="400" border="1" cellspacing="0" cellpadding="0">
<tr>
<?php error_bool($error, "name"); ?> Name </td>
<td><input name="name" type="text" id="name" value="<? echo $_POST["name"]; ?>"></td>
</tr>
<tr>
<?php error_bool($error, "email"); ?> Email </td>
<td><input name="email" type="text" id="email" value="<? echo $_POST["email"]; ?>"></td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="Submit"></td>
<td> </td>
</tr>
</table>
</form>
<?
}
if(isset($_POST["Submit"])) {
check_form();
} else {
show_form();
}
function check_email_address($email) {
// First, we check that there's one @ symbol, and that the lengths are right
if (!ereg("^[^@]{1,64}@[^@]{1,255}$", $email)) {
// Email invalid because wrong number of characters in one section, or wrong number of @ symbols.
return false;
}
// Split it into sections to make life easier
$email_array = explode("@", $email);
$local_array = explode(".", $email_array[0]);
for ($i = 0; $i < sizeof($local_array); $i++) {
if (!ereg("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$", $local_array[$i])) {
return false;
}
}
if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1])) { // Check if domain is IP. If not, it should be valid domain name
$domain_array = explode(".", $email_array[1]);
if (sizeof($domain_array) < 2) {
return false; // Not enough parts to domain
}
for ($i = 0; $i < sizeof($domain_array); $i++) {
if (!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$", $domain_array[$i])) {
return false;
}
}
}
return true;
}
function check_form()
{
global $HTTP_POST_VARS, $error, $print_again;
$error['name'] = false;
if($_POST["name"]=="") {
$error['name'] = true;
$print_again = true;
$message="The name field is empty<br>";
}
if(!check_email_address($_POST['email'])) {
$error['email'] = true;
$print_again = true;
$message.="Either Field Empty or Invalid Email ID <br>";
}
if($print_again) {
show_form();
} else {
show_form();
$message="All Fields are valid <br>
Now, In this way you can validate the other textfield as well<br>
You can insert data into table";
}
echo "$message";
}
?>
</body>
</html>
Used to valid the form data by using php with attractive error message by coloring the text
..................... :)
No comments:
Post a Comment