Modify php function. If Empty display this number.

Hi, I sm trying to write a function in WordPress, which works with WP Job Manager.

The function is a phone number field. The below code is working,  but i want to edit it so that if i don't enter a number, it will display a default number, ie what's in the placeholder.

How would i modify the code below to do this?

/* ------ Add Phone Number ------- */
add_filter( 'job_manager_job_listing_data_fields', 'admin_add_phonenumber_field' );
function admin_add_phonenumber_field( $fields ) {
  $fields['_job_phonenumber'] = array(
    'label'       => __( 'Recruiting PhoneNumber', 'job_manager' ),
    'type'        => 'text',
    'placeholder' => '800-998-2221',
    'description' => ''
  return $fields;

/* ------ Add Phone Number ------- */
add_action( 'single_job_listing_meta_end', 'display_job_phonenumber_data' );
function display_job_phonenumber_data() {
  global $post;

  $phonenumber = get_post_meta( $post->ID, '_job_phonenumber', true );

  if ( $phonenumber ) {
    echo 'Call Now To Speak With A Recruiter <a href="tel:' . esc_html( $phonenumber ) . '">' . esc_html( $phonenumber ) . '</a>';

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Jon ImmsWeb DeveloperAsked:
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Julian HansenCommented:
You mean something like this

$phonenumber = get_post_meta( $post->ID, '_job_phonenumber', true );
$phonenumber = empty($phonenumber) ? '800-998-2221' : $phonenumber

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In other words if phone number is empty then default it to default otherwise use it as is

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