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September 5, 2020 18:23
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Shows how to wrap an outgoing WordPress email with structural HTML such as a doctype, meta tags, style, etc.
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| <?php | |
| /* | |
| * Plugin Name: xnau HTML Email Wrapper | |
| * Description: Adds a structural HTML wrapper to outgoing WordPress emails. | |
| */ | |
| class xnau_email_html_wrapper { | |
| /** | |
| * | |
| */ | |
| public function __construct() | |
| { | |
| add_filter( 'wp_mail', array($this, 'wrap_wp_email_body') ); | |
| } | |
| /** | |
| * wraps the email body of all WP outgoing emails | |
| * | |
| * @param array $args the email components | |
| * @return array the modified components | |
| */ | |
| public function wrap_wp_email_body( $args ) | |
| { | |
| $args['message'] = str_replace( '{body}', $args['message'], $this->wrapper() ); | |
| return $args; | |
| } | |
| /** | |
| * provides the html wrapper | |
| * | |
| * this wrapper must contain the {body} placeholder where the unwrapped email body goes | |
| * | |
| * this wrapper is based on an article in emailonacid.com | |
| * | |
| * @see https://www.emailonacid.com/blog/article/email-development/which-code-should-i-include-in-every-email/ | |
| * @return string | |
| */ | |
| private function wrapper() | |
| { | |
| ob_start(); | |
| ?> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
| <html lang="en" xmlns="http://www.w3.org/1999/xhtml" > | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| </head> | |
| <body style="margin:0;padding:0;min-width:100%;background-color:#ffffff;"> | |
| <table width="100%" border="0" cellpadding="0" cellspacing="0" style="min-width: 100%;" role="presentation"> | |
| <tr> | |
| <td> | |
| {body} | |
| </td> | |
| </tr> | |
| </table> | |
| </body> | |
| </html> | |
| <?php | |
| return ob_get_clean(); | |
| } | |
| } | |
| // invoke the class | |
| new xnau_email_html_wrapper; | |
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This will wrap the body of all outgoing emails that use the WordPress core to send.
To apply this selectively, you'd inspect the values in the $args array to determine whether to apply the wrap, or possibly apply a different wrap.