Reverse Image Search Plugin for WordPress

isc-reverse-search.php

<?php
/**
 * Plugin Name:       ISC Reverse Image Search Link
 * Plugin URI:        https://imagesourcecontrol.com/blog/reverse-image-search-plugin/
 * Description:       Adds a "Reverse Search" link to the WordPress Media Library list view for images, linking to Google Image Search.
 * Version:           1.0.0
 * Author:            Thomas Maier @ Image Source Control
 * Author URI:        https://imagesourcecontrol.com/
 * License:           GPL-2.0-or-later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       isc-reverse-search
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}

// Add a 'Reverse Search' column to the Media Library list view
function isc_add_reverse_search_column_plugin( $columns ) {
    $columns['reverse_search'] = __( 'Reverse Search', 'isc-reverse-search' );
    return $columns;
}
add_filter( 'manage_media_columns', 'isc_add_reverse_search_column_plugin' );

// Populate the 'Reverse Search' column
function isc_reverse_search_column_content_plugin( $column_name, $post_id ) {
    if ( 'reverse_search' !== $column_name ) {
        return;
    }

    // Check if the attachment is an image
    if ( wp_attachment_is_image( $post_id ) ) {
        $image_url = wp_get_attachment_url( $post_id );
        if ( $image_url ) {
            // Ensure the image URL is properly encoded for the Google Images URL
            $encoded_image_url = rawurlencode( $image_url );
            $google_search_url = 'https://images.google.com/searchbyimage?image_url=' . $encoded_image_url;
            printf( '<a href="%s" target="_blank" rel="noopener noreferrer">%s</a>',
                esc_url( $google_search_url ),
                esc_html__( 'Search on Google', 'isc-reverse-search' )
            );
        }
    }
}
add_action( 'manage_media_custom_column', 'isc_reverse_search_column_content_plugin', 10, 2 );

// Optional: Load plugin text domain for translations
function isc_reverse_search_load_textdomain_plugin() {
    load_plugin_textdomain( 'isc-reverse-search', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
}
add_action( 'plugins_loaded', 'isc_reverse_search_load_textdomain_plugin' );

?>