PHP

Get the Nth Binary Part of a Content-Type into BinData

Demonstrates the Chilkat Email.GetNthBinaryPartOfTypeBd method, which loads the binary bytes of the Nth MIME sub-part matching a content-type pattern into a BinData object. The arguments are the zero-based index among the matching parts, the content-type pattern, an inlineOnly flag, an excludeAttachments flag, and the BinData that receives the bytes. This example extracts the first image/png part.

Background: This is the binary, type-targeted way to pull a specific part out of a message — ideal for extracting, say, every image/png or the one application/pdf from a complex MIME tree without caring whether it is an attachment, an inline image, or a body part. Reading into a BinData keeps the raw bytes exact, ready to save, hash, or re-transmit.

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<?php

use Chilkat2\BinData;
use Chilkat2\Email;

// Demonstrates the GetNthBinaryPartOfTypeBd method, which loads the binary bytes of the Nth
// MIME sub-part matching a Content-Type pattern into a BinData object.  The arguments are
// the zero-based index among matching parts, the Content-Type pattern, inlineOnly,
// excludeAttachments, and the BinData that receives the bytes.

$email = new Email();
$email->Subject = 'GetNthBinaryPartOfTypeBd example';
$email->Body = 'See the attached image.';

// Load the image from a file into a BinData object and attach it (binary data belongs
// in a BinData, never in a string).
$bdImage = new BinData();
try {
    $bdImage->LoadFile('qa_data/images/photo.png');

    $email->AddAttachmentBd('photo.png', $bdImage, 'image/png');

    // Load the bytes of the first (index 0) image/png part into a BinData object.
    $bd = new BinData();
    $email->GetNthBinaryPartOfTypeBd(0, 'image/png', false, false, $bd);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'image/png part size (bytes) = ', $bd->NumBytes, "\n";

// Note: The path "qa_data/images/photo.png" is a relative local filesystem path,
// relative to the current working directory of the running application.