How to send barcode via email in wp mail

To send a barcode via email in WordPress using the wp_mail function, you'll need to encode the barcode as an image and then attach it to the email. Here's a step-by-step guide:

Step 1: Generate the barcode

You can use a PHP library like php-barcode or Zend_Barcode to generate the barcode. For example, using php-barcode:

require_once 'php-barcode/autoload.php';

$barcode = new Barcode('EAN13', '1234567890123');
$barcode->setScale(2);
$barcode->setThickness(10);
$barcode->setForegroundColor(array('rgb' => '000000'));
$barcode->setBackgroundColor(array('rgb' => 'FFFFFF'));
$barcode->draw();

This will generate a barcode image as a PNG file.

Step 2: Encode the barcode as a base64 string

Use the base64_encode function to encode the barcode image as a base64 string:

$barcode_image = file_get_contents($barcode->getPath());
$barcode_base64 = base64_encode($barcode_image);

Step 3: Attach the barcode image to the email

Use the wp_mail function to send the email, and attach the barcode image as a base64-encoded string:

$subject = 'Barcode Email';
$message = 'Hello, here is your barcode:';

$headers = array(
    'Content-Type: text/html; charset=UTF-8',
    'Content-Transfer-Encoding: base64'
);

$attachments = array(
    array(
        'name' => 'barcode.png',
        'type' => 'image/png',
        'base64' => $barcode_base64
    )
);

wp_mail($to_email, $subject, $message, $headers, $attachments);

In this example, we're attaching the barcode image as a PNG file named barcode.png. The base64 attribute specifies that the attachment is a base64-encoded string.

Step 4: Display the barcode in the email

In the email body, you can display the barcode using an <img> tag:

$message = 'Hello, here is your barcode:<br><img src="data:image/png;base64,'. $barcode_base64. '">';

This will display the barcode image in the email body.

That's it! With these steps, you should be able to send a barcode via email in WordPress using the wp_mail function.