Simple EXIF display for JIG

functions.php

<?php
// I recommend using the Code Snippets plugin https://wordpress.org/plugins/code-snippets/
// In the case of which only the below code is needed

// This inserts basic EXIF data in the description of photos in JIG galleries, if available

add_action('init', function() {
    add_filter('jig_images', 'jig_exif_captions', 10, 2);
});

function jig_exif_captions($images, $atts)
{
    // Ensure the required file is included
    if (!function_exists('wp_read_image_metadata')) {
        require_once ABSPATH . 'wp-admin/includes/image.php';
    }

    foreach ($images as &$image) {
        if (empty($image['extra_class']) || strpos($image['extra_class'], 'jig-contentID-ML-') === false) {
            continue; // Changed from break to continue to ensure the loop continues to the next image
        }
        if (preg_match('/(\d)+/i', $image['extra_class'], $regs)) {
            $id = $regs[0];
        } else {
            continue; // Changed from break to continue to ensure the loop continues to the next image
        }

        // Get the file path of the image using the ID
        $file = get_attached_file($id);

        // Read the EXIF data from the image
        $metadata = wp_read_image_metadata($file);

        if ($metadata) {
            $exif_data = [];

            if (!empty($metadata['focal_length'])) {
                $exif_data[] = $metadata['focal_length'] . ' mm';
            }
            if (!empty($metadata['shutter_speed'])) {
                $exif_data[] = format_shutter_speed($metadata['shutter_speed']);
            }
            if (!empty($metadata['aperture'])) {
                $exif_data[] = 'f/' . $metadata['aperture'];
            }
            if (!empty($metadata['iso'])) {
                $exif_data[] = 'ISO ' . $metadata['iso'];
            }
            if (!empty($metadata['created_timestamp'])) {
                $exif_data[] = date('Y-m-d H:i:s', $metadata['created_timestamp']);
            }

            // Join the EXIF data with a middle dot
            $exif_string = implode(' · ', $exif_data);

            // Append the EXIF data to the image description
            if (empty($image['description'])) {
                $image['description'] = $exif_string;
            } else {
                $image['description'] .= '<br>' . $exif_string;
            }
        }
    }
    return $images;
}

function format_shutter_speed($shutter_speed)
{
    if ($shutter_speed <= 0) {
        return $shutter_speed . ' sec';
    }

    // Calculate the reciprocal of the shutter speed
    $reciprocal = 1 / $shutter_speed;

    if ($reciprocal > 1) {
        // Format as a fraction if the reciprocal is greater than 1
        return '1/' . round($reciprocal) . ' sec';
    } else {
        // Otherwise, display the original value in seconds
        return round($shutter_speed, 2) . ' sec';
    }
}