Mail sent but attachment not received in wp_mail() - php

Question

I am new in wordpress. I am trying to send a mail with an attachment. But every time the mail is being sent but the attachment is not. I searched almost all the post related to this topic here but all the solutions failed for me. I checked the path a lot of times and found that it is correct from 'uploads' folder. Please help me. This is my code,
<?php
if(isset($_POST['email'])){
$to = $_POST['email'];
$pdf = $_POST['pdf'];
$subject = "Presidency Alumni Annual Report";
$message = "Please download the attachment.";
$headers = 'From: Presidency Alumni Association Calcutta <noreply#presidencyalumni.com>' . "\n";
if($pdf == 'a'){
$attachments = array(WP_CONTENT_DIR . 'uploads/2015/01/Coffee-Mug-Banner.jpg');
}
else if($pdf == 'b'){
$attachments = array(WP_CONTENT_DIR . 'uploads/2014/08/Alumni-Autumn-Annual-2014.pdf');
}
else{
$attachments = array(WP_CONTENT_DIR . 'uploads/2014/08/Autumn-Annual-2012.pdf');
}
wp_mail($to, $subject, $message, $headers, $attachments);
print '<script type="text/javascript">';
print 'alert("Your Mail has been sent successfully")';
print '</script>';
}
?>

Answer 1

The most probable reason this to happen is if the condition if($pdf == 'a') {...} else if ($pdf == 'b') {...}) is not true. Check to see if this variable pdf is set properly in your post HTML form.
Also make sure that the constant WP_CONTENT_DIR contains something, i.e. is not empty string, because otherwise your path to the attachments will be invalid, i.e. it is better to access your uploads directory like this:
<?php $upload_dir = wp_upload_dir(); ?>
The $upload_dir now contains something like the following (if successful):
Array (
[path] => C:\path\to\wordpress\wp-content\uploads\2010\05
[url] => http://example.com/wp-content/uploads/2010/05
[subdir] => /2010/05
[basedir] => C:\path\to\wordpress\wp-content\uploads
[baseurl] => http://example.com/wp-content/uploads
[error] =>
)
Then, modify your code:
$attachments = array($upload_dir['url'] . '/2014/08/Autumn-Annual-2012.pdf');
See the documentation.