php : email sending failed with more than one attachment

Question

I am trying to implement mail functionality in php, its working fine with single attachment, but problem is when I am trying to send more than one attachment, its not working. I am using php mail() function for sending emails, I am trying to attach a PDF and an Image file. If PDF attach then Image won't attach, if Image attach then PDF won't attach. Any thoughts where I'm doing wrong?

$header       .= 'From: test <[email protected]>' . "\r\n";       
$header       .= "MIME-Version: 1.0\r\n";
$file           = '1.png'
$displayname    = '1.png';
$file_size     = filesize($file);
$handle        = fopen($file, "r");
$content       = fread($handle, $file_size);
fclose($handle);
$content       = chunk_split(base64_encode($content));
$uid           = md5(uniqid(time()));
$name          = basename($file);

$filepdf        = '1.pdf'
$displaynamepdf= '1.pdf';
$file_sizepdf  = filesize($filepdf);
$handlepdf     = fopen($filepdf, "r");
$contentpdf    = fread($handlepdf, $file_sizepdf);
fclose($handlepdf);
$contentpdf    = chunk_split(base64_encode($contentpdf));
$name          = basename($file);

$header       .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n\r\n";
$header       .= "This is a multi-part message in MIME format.\r\n";
$header       .= "--".$uid."\r\n";
$header       .= "Content-type:text/plain; charset=iso-8859-1\r\n";
$header       .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
$header       .= $message."\r\n\r\n";
$header       .= "--".$uid."\r\n";
$header       .= "Content-Type: application/octet-stream; name=\"".$displayname."\"\r\n"; // use different content types here
$header       .= "Content-Transfer-Encoding: base64\r\n";
$header       .= "Content-Disposition: attachment; filename=\"".$displayname."\"\r\n\r\n";
$header       .= $content."\r\n\r\n";

$header       .= "Content-Type: application/octet-stream; name=\"".$displaynamepdf."\"\r\n"; // use different contentpdf types here
$header       .= "Content-Transfer-Encoding: base64\r\n";
$header       .= "Content-Disposition: attachment; filename=\"".$displaynamepdf."\"\r\n\r\n";
$header       .= $contentpdf."\r\n\r\n";
$header       .= "--".$uid."--";

if (mail($to, $subject, "", $header)) {
   return 'sent';
} else {
    return 'not sent';
}

Answer 1

PHPMailer is the best to use for email.

checkout some below links which will help you in future also:

1. File Attachments in PHP Mail with PHPMailer
2. php mailer attachments
3. attachments using phpMailer
4. PHPMailer Tutorial
5. A Simple Example : Sending Email with Attachment Using Phpmailer
6. PHP send email with multiple attachments with PHPMailer with SMTP Authentication
7. Sending email with multiple attachments with PHP

may this help you.