function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
    // Compact the input, apply the filters, and extract them back out.

    
/**
 * Filters the wp_mail() arguments.
 *
 * @since 2.2.0
 *
 * @param array $args {
 *     Array of the `wp_mail()` arguments.
 *
 *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
 *     @type string          $subject     Email subject.
 *     @type string          $message     Message contents.
 *     @type string|string[] $headers     Additional headers.
 *     @type string|string[] $attachments Paths to files to attach.
 * }
 */
    $atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) );

    
/**
 * Filters whether to preempt sending an email.
 *
 * Returning a non-null value will short-circuit {@see wp_mail()}, returning
 * that value instead. A boolean return value should be used to indicate whether
 * the email was successfully sent.
 *
 * @since 5.7.0
 *
 * @param null|bool $return Short-circuit return value.
 * @param array     $atts {
 *     Array of the `wp_mail()` arguments.
 *
 *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
 *     @type string          $subject     Email subject.
 *     @type string          $message     Message contents.
 *     @type string|string[] $headers     Additional headers.
 *     @type string|string[] $attachments Paths to files to attach.
 * }
 */
    $pre_wp_mail = apply_filters( 'pre_wp_mail', null, $atts );

    if ( null !== $pre_wp_mail ) {
      return $pre_wp_mail;
    }

    if ( isset( $atts['to'] ) ) {
      $to = $atts['to'];
    }

    if ( ! is_array( $to ) ) {
      $to = explode( ',', $to );
    }

    if ( isset( $atts['subject'] ) ) {
      $subject = $atts['subject'];
    }

    if ( isset( $atts['message'] ) ) {
      $message = $atts['message'];
    }

    if ( isset( $atts['headers'] ) ) {
      $headers = $atts['headers'];
    }

    if ( isset( $atts['attachments'] ) ) {
      $attachments = $atts['attachments'];
    }

    if ( ! is_array( $attachments ) ) {
      $attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
    }
    global $phpmailer;

    // (Re)create it, if it's gone missing.
    if ( ! ( $phpmailer instanceof PHPMailer\PHPMailer\PHPMailer ) ) {
      require_once ABSPATH . WPINC . '/PHPMailer/PHPMailer.php';
      require_once ABSPATH . WPINC . '/PHPMailer/SMTP.php';
      require_once ABSPATH . WPINC . '/PHPMailer/Exception.php';
      $phpmailer = new PHPMailer\PHPMailer\PHPMailer( true );

      $phpmailer::$validator = static function ( $email ) {
        return (bool) is_email( $email );
      };
    }

    // Headers.
    $cc       = array();
    $bcc      = array();
    $reply_to = array();

    if ( empty( $headers ) ) {
      $headers = array();
    } else {
      if ( ! is_array( $headers ) ) {
        // Explode the headers out, so this function can take
        // both string headers and an array of headers.