What are some common pitfalls when sending emails with attachments using PHP?

One common pitfall when sending emails with attachments using PHP is not setting the appropriate MIME type for the attachment, which can result in the attachment not being recognized by the recipient's email client. To solve this issue, make sure to set the MIME type for the attachment using the `mime_content_type()` function in PHP. 

$filename = 'attachment.pdf';
$file_path = '/path/to/attachment.pdf';

$attachment_content = file_get_contents($file_path);
$attachment_base64 = base64_encode($attachment_content);
$attachment_mime = mime_content_type($file_path);

$attachment = chunk_split($attachment_base64);

$boundary = md5(uniqid(time()));

$headers = "From: sender@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"{$boundary}\"\r\n";

$body = "--{$boundary}\r\n";
$body .= "Content-Type: application/pdf; name=\"{$filename}\"\r\n";
$body .= "Content-Disposition: attachment; filename=\"{$filename}\"\r\n";
$body .= "Content-Transfer-Encoding: base64\r\n";
$body .= "\r\n";
$body .= $attachment;
$body .= "\r\n--{$boundary}--";

mail('recipient@example.com', 'Subject', $body, $headers);

Keywords

PHP email attachments MIME error handling

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