MT | Send an email Tribe style

tribe_mail.php

<?php
/**
 * Sends an email Tribe style
 *
 * This will retrieve a template file and use it to populate the content body.
 * Defaults to HTML emails.
 *
 * @param string       $email_name  Name of this email in snake_case format, used as suffix in apply_filter().
 * @param string|array $to          Array or comma-separated list of email addresses to send message.
 * @param string       $subject     Email subject.
 * @param array        $template    Arguments passed to tribe_get_template_part() for populating the message body.
 * @param array        $args        See tribe_mail filter for full list.
 *
 * @see tribe_get_template_part() for valid $template arguments.
 * @see tribe_mail Filter for full list of args.
 *
 * @return bool Indicates if email was sent successfully.
 */
function tribe_mail( $email_name, $to, $subject, $template, $args = array() ) {
	$args = wp_parse_args( $args, array(
		'headers' => array( 'Content-type: text/html' ),
		'attachments' => array(),
		'send_email' => true,
	) );

	$args['to']       = $to;
	$args['subject']  = $subject;
	$args['template'] = $template;

	/**
	 * Alter tribe email parameters before they are sent
	 *
	 * @param array $args {
	 *  All of the attributes for this email.
	 *
	 *  @param string|array $to          Array or comma-separated list of email addresses to send message.
	 *  @param string       $subject     Email subject.
	 *  @param array        $template    Arguments passed to tribe_get_template_part() for populating the message body.
	 *  @param string|array $headers     Additional headers.
	 *  @param string|array $attachments Files to attach.
	 *  @param bool         $send_email  Whether or not to send the email.
	 * }
	 * @param string $email_name Unique name for this email.
	 */
	$args = apply_filters( 'tribe_mail', $args, $email_name );

	/**
	 * Dynamic filter that can be used to filter a given email
	 *
	 * Concatenates tribe_mail_ with the dynamic email name.
	 *
	 * @see tribe_mail for detailed documentation on $args.
	 */
	$args = apply_filters( 'tribe_mail_' . $email_name, $args );

	$message = call_user_func_array( 'tribe_get_template_part', $args['template'] );
	$success = false;

	if ( $args['send_email'] ) {
		$success = wp_mail( $args['to'], $args['subject'], $message, $args['headers'], $args['attachments'] );
	}

	return $success;
}