Inline image attachments with wp_mail()

[jesin]

To insert inline images in an email the phpmailer_init action hook has to be used like this.

add_action( 'phpmailer_init', 'embed_images' );

function embed_images( &$phpmailer ) {
    $phpmailer->AddEmbeddedImage( '/path/to/image1.png', 'image1.png' );
    $phpmailer->AddEmbeddedImage( '/path/to/image2.png', 'image2.png' );
    $phpmailer->AddEmbeddedImage( '/path/to/image3.png', 'image3.png' );
}

Why not implement this in wp_mail() itself?

[jesin]

Add inline images using wp_mail()

[jesin]

Update 28059.diff

[swissspidy]

According to the docs, $phpmailer->addEmbeddedImage is only useful for HTML messages. What happens when you use that in a text email?

[jesin]

Replying to swissspidy:

According to the docs, $phpmailer->addEmbeddedImage is only useful for HTML messages. What happens when you use that in a text email?

In a text message the email client shows the image as an attachment. I tested this on Gmail and Outlook.com.

[chris@…]

I'm not sure if this is needed at the wp_mail level or not (although I needed to do the workaround today) but if this gets refreshed I wouldn't blindly assume that basename( $embed ) is valid for the $cid parameter.

Most people probably have image-1.png and image-2.png but it could be http://example.com/cats/logo.png and http://example.com/dogs/logo.png and basename() would turn them both into logo.png.