PHP

Attach a File with an Explicit Content Type

Demonstrates the Chilkat Email.AddFileAttachment2 method, which attaches a file from the filesystem and lets you explicitly specify its content type rather than having Chilkat infer it from the file extension. This example attaches a binary file as application/octet-stream.

Background: Extension-based type detection is convenient but not always right — a file may have an unusual or missing extension, or you may need a very specific MIME type for the recipient to process it correctly. Specifying the content type explicitly removes the guesswork. application/octet-stream is the generic "arbitrary binary data" type, a safe default that tells the client to treat the attachment as an opaque download rather than trying to render it.

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Chilkat2 PHP

<?php

use Chilkat2\Email;

// Demonstrates the AddFileAttachment2 method, which attaches a file and lets you
// explicitly specify its content type instead of letting Chilkat infer it.

$email = new Email();
$email->Subject = 'Email with a file attachment';
$email->Body = 'Please see the attached file.';

// Attach a file, explicitly specifying the content type.
try {
    $email->AddFileAttachment2('qa_data/attachments/data.bin', 'application/octet-stream');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'NumAttachments = ', $email->NumAttachments, "\n";

// Note: The path "qa_data/attachments/data.bin" is a relative local filesystem path,
// relative to the current working directory of the running application.