JSON LD using custom fields from wordpress.

json-ld-wordpress-custom-fields.json

<script type="application/ld+json">
  {
    "@context": "http://schema.org",
    "@type": "SelfStorage",
    "address": {
      "@type": "PostalAddress",
      "addressLocality": "<?php echo($location_town) ?>",
      "addressRegion": "<?php echo($location_county) ?>",
      "postalCode":"<?php echo($location_postcode) ?>",
      "streetAddress": "<?php echo($location_address_line_1) ?>,
        <?php
        if (!empty($location_address_line_2)) {
          echo''. $location_address_line_2 .', ';
        }
        if (!empty($location_address_line_3)) {
          echo''. $location_address_line_3 .'';
        }
        ?>"
    },
    "name": "<?php bloginfo('name'); ?>",
    "telephone": "<?php echo main_branch('tel'); ?>",
<?php
          if ($location_24h == true) {
            echo '
"openingHours": [
"Mo 00:00-00:00",
"Tu 00:00-00:00",
"We 00:00-00:00",
"Th 00:00-00:00",
"Fr 00:00-00:00",
"Sa 00:00-00:00",
"Su 00:00-00:00"
]
            ';
          } else {
            if (!empty($location_openinh_hours)) {
              echo'
 "openingHours": [
"Mo '.$location_openinh_hours.'",
"Tu '.$location_openinh_hours.'",
"We '.$location_openinh_hours.'",
"Th '.$location_openinh_hours.'",
"Fr '.$location_openinh_hours.'",
"Sa '.$location_openinh_hours.'",
"Su '.$location_openinh_hours.'"
]
              ';
            }
          }
          ?>

  }
</script>