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How to add new variables to Paid Memberships Pro email templates

In a recent project I was looking to add new variables to the email templates add-on of the Paid Memberships Pro plugin for WordPress.

The variable I wanted to add was the site_url or home_url.

Add the following to your functions.php file of your them to add new email template variables:

//add new email template variables
add_filter("pmpro_email_filter", "my_pmpro_email_filter");
function my_pmpro_email_filter($email) {
	$extra_variables = array(
		'site_url' => site_url()	
	);
	foreach($extra_variables as $key => $value) {
		$email->subject = str_replace("!!" . $key . "!!", $value, $email->subject);
		$email->body = str_replace("!!" . $key . "!!", $value, $email->body);
	}
	return $email;
}

Just add whatever extra variables to the $extra_variables array.

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