メールが受信者のメールに送信されません。送信されない原因となっている以下のコードの問題点を説明してください。
メールフォーム(html)
<h1>Send Us Your Feedback!</h1>
<form action="send_mail.php" method="post">
<table>
<tr>
<td>Email Adress:</td>
<td>
<input type="text" name="email_from" value="" maxlength="100" />
</td>
</tr>
<tr>
<td>Artist id:</td>
<td>
<textarea rows="10" cols="50" name="artist_id"></textarea>
</td>
</tr>
<tr><td> </td>
<td>
<input type="submit" value="Submit" />
</td>
</tr>
</table>
</form>
メールを送信(php)
<?php
/*
This first bit sets the email address that you want the form to be submitted to.
You will need to change this value to a valid email address that you can access.
*/
$webmaster_email = "berndamian@gmail.com";
/*
This bit sets the URLs of the supporting pages.
If you change the names of any of the pages, you will need to change the values here.
*/
$feedback_page = "feedback_form.html";
$error_page = "error_message.html";
$thankyou_page = "thank_you.html";
/*
This next bit loads the form field data into variables.
If you add a form field, you will need to add it here.
*/
$message = $_REQUEST['Advertiser email: $email_from \n Artist id: $artist_id '] ;
$email_from = $_REQUEST['email_from'] ;
$artist_id = $_REQUEST['artist_id'] ;
/*
The following function checks for email injection.
Specifically, it checks for carriage returns - typically used by spammers to inject a CC list.
*/
function isInjected($str) {
$injections = array('(\n+)',
'(\r+)',
'(\t+)',
'(%0A+)',
'(%0D+)',
'(%08+)',
'(%09+)'
);
$inject = join('|', $injections);
$inject = "/$inject/i";
if(preg_match($inject,$str)) {
return true;
}
else {
return false;
}
}
// If the user tries to access this script directly, redirect them to the feedback form,
if (!isset($_REQUEST['email_from'])) {
header( "Location: $feedback_page" );
}
// If the form fields are empty, redirect to the error page.
elseif (empty($email_from) || empty($artist_id)) {
header( "Location: $error_page" );
}
// If email injection is detected, redirect to the error page.
elseif ( isInjected($email_from) ) {
header( "Location: $error_page" );
}
// If we passed all previous tests, send the email then redirect to the thank you page.
else {
mail( "$webmaster_email", "FEEDBACK FOR AN ARTIST",
$message, "From: $email_from" );
header( "Location: $thankyou_page" );
}
?>