Server Side Validation e-mail

NickG21 · December 27, 2006

hey everyone, i was wondering if anyone could take a quick look at the code i have below. i am trying to create a form that has e-mail validation on it, i have all the syntax validation down but i am unable to figure out the server side. this is what i have come up with from the tutorials and other scripts i have been reading. thanks to everyone in advance

[code]<?php
function checkEmail($email)
{
if (!preg_match("/^([a-zA-Z0-9])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-]+)+/", $email))
{
return false;
}
list($Username, $Domain) = split("@",$email);
if(getmxrr($Domain, $MXHost))
{
return TRUE;
}
else
{
if(fsockopen($Domain, 25, $errno, $errstr, 30))
{
return TRUE;
}
else
{
return FALSE;
}
}
}
if (isset($_POST['submit'])) {
$email = $_POST['email'];
$name = $_POST['text1'];
$number = $_POST['text2'];
$error = array();

// check e-mail address
// display success or failure message
if (!preg_match("/^([a-zA-Z])+/",$name)){
$error[] = "Your Name May Only Contain Letters";
$name="";
}
if (!preg_match("/^([0-9])+/",$number)){
$error[] = "Invalid ZipCode";
$number="";
}
if (CheckEmail($email) == FALSE)
{
$error[] = "Invalid E-Mail Address";
$email="";
}

if (count($error)>0) {
$msg = "<p class=\"error\"><big><b>The Following Errors Were Found, Please Re-Enter:</b></big><br/>". implode('<br />', $error). "</p>";
} else {
$msg = "<p><b>Thank You, Your Information Has Been Accepted</b></p>";
}
}

echo isset($msg) ? $msg : '';
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
<form action="emailserver.php" method="post">
<table class="qForm">
<tr>
<td class="left"><a>Your Name:</a></td>
<td><input type="text" size="28" name="text1" value="<? echo"$name"?>"><br/></td>
</tr>
<tr>
<td class="left" ><a>Zip Code:</a></td>
<td><input type="text" size="28" name="text2" maxlength="5" value="<? echo"$number"?>"><br/></td>
</tr>
<tr>
<td class="left"><a>E-Mail Address:</a></td>
<td><input type="text" name="email" size="28" value="<? echo"$email"?>"><br/></td>
</tr>
<tr>
<td><input type="submit" name="submit" value="Submit"><br/></td>
<td class="left"><input type="reset" name="reset" value="Reset"></td>
</tr>
</table>
</form>
</body>
</html>[/code]

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Server Side Validation e-mail

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