PHP

Add a Related Item from a BinData Object

Demonstrates the Chilkat Email.AddRelatedBd method, which adds a related item (such as an inline image) using the contents of a BinData object, and returns the generated Content-ID. This example loads an image into a BinData, adds it, captures the Content-ID, and references it from the HTML body.

Background: This is the binary, Content-ID-based way to embed an inline resource — the right choice for images, whose bytes belong in a BinData rather than a string. Because Chilkat generates the Content-ID, the usual pattern is: add the item first, capture the returned ID, then build the matching <img src="cid:..."> reference from it (done here with a StringBuilder).

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<?php

use Chilkat2\BinData;
use Chilkat2\Email;
use Chilkat2\StringBuilder;

// Demonstrates the AddRelatedBd method, which adds a related item (such as an inline image)
// using the contents of a BinData object, and returns the generated Content-ID.

$email = new Email();
$email->Subject = 'Related image from BinData';

// Load the image data from a file into a BinData object.
$bdImage = new BinData();
try {
    $bdImage->LoadFile('qa_data/images/logo.png');

    // Add the image as a related item; capture its generated Content-ID.
    $cid = $email->AddRelatedBd('logo.png', $bdImage);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Reference the related item in the HTML body by its Content-ID.
$sbHtml = new StringBuilder();
$sbHtml->Append('<html><body><img src="cid:PLACEHOLDER_CID"/></body></html>');
$numReplaced = $sbHtml->Replace('PLACEHOLDER_CID', $cid);
$email->SetHtmlBody($sbHtml->GetAsString());

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

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