PHP Extension

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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<?php

include("chilkat.php");

$success = false;

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

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

//  Attach a file, explicitly specifying the content type.
$success = $email->AddFileAttachment2('qa_data/attachments/data.bin','application/octet-stream');
if ($success == false) {
    print $email->lastErrorText() . "\n";
    exit;
}

print 'NumAttachments = ' . $email->get_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.

?>