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@danieliser
Created October 22, 2022 09:49
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Allow overloading WP email templates with custom wrappers and dynamic data
<?php
function get_custom_email_template() {
ob_start();
include __DIR__ . '/index.php';
$content = ob_get_clean();
ob_end_clean();
return $content;
}
function custom_wp_mail_atts( $atts ) {
$headers = [
'Content-type: text/html; charset=UTF-8',
];
$template_tags = [
'[title]' => $atts['subject'],
'[subject]' => $atts['subject'],
'[content]' => $atts['message'],
'[copyright]' => sprintf( "© %d %s, All rights reserved", date( 'Y' ), get_bloginfo( 'name' ) ),
];
$content = get_custom_email_template();
foreach( $template_tags as $tag => $value ) {
$content = str_replace( array_keys( $template_tags ), array_values( $template_tags ), $content );
}
$atts["message"] = $content;
$atts['headers'] = is_array( $atts['headers'] ) ?
array_merge( $atts['headers'], $headers ) :
$headers;
return $atts;
}
add_filter( 'wp_mail', 'custom_wp_mail_atts', 10 );
function custom_email_template_attachments( &$phpmailer) {
$template_images = [
'logo' => 'logo.png',
'shadow' => 'shadow.png',
];
$used_tags =
$phpmailer->SMTPKeepAlive = true;
foreach( $template_images as $uid => $file ) {
if ( is_file( __DIR__ . '/img/' . $file ) ) {
$phpmailer->AddEmbeddedImage(
__DIR__ . '/img/' . $file,
$uid,
$file
);
}
}
}
add_action( 'phpmailer_init', 'custom_email_template_attachments' );
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:o="urn:schemas-microsoft-com:office:office">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="x-apple-disable-message-reformatting">
<title>[title]</title>
<!--[if mso]>
<noscript>
<xml>
<o:OfficeDocumentSettings>
<o:PixelsPerInch>96</o:PixelsPerInch>
</o:OfficeDocumentSettings>
</xml>
</noscript>
<![endif]-->
<style>
table, td, div, h1, p {font-family: Arial, sans-serif;}
</style>
</head>
<body style="margin:0;padding:0;">
<table role="presentation" style="width:100%;border-collapse:collapse;border:0;border-spacing:0;background:#ffffff;">
<tr>
<td align="center" style="padding:0;">
<img src="cid:logo" width="300" />
[content]
<img src="cid:shadow" width="300" />
</td>
</tr>
</table>
</body>
</html>
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