v2 with selectable redirect type

wordpress-404-redirect.php

@@ -0,0 +1,84 @@
+<?php
+/**
+ * Plugin Name: WordPress 404 Redirect
+ * Description: WordPress plugin to redirect 404 URLs to a specified URL.
+ * Author: Infinitnet
+ * Author URI: https://infinitnet.io/
+ * Plugin URI: https://github.com/infinitnet/wordpress-404-redirect
+ * Update URI: https://github.com/infinitnet/wordpress-404-redirect
+ * Version: 2.0.0
+ * License: GPLv3
+ * Text Domain: wordpress-404-redirect
+ */
+
+function wp_404_redirect_menu() {
+    add_options_page('404 Redirect Settings', '404 Redirect', 'manage_options', 'wp-404-redirect', 'wp_404_redirect_page');
+}
+
+function wp_404_redirect_page() {
+    if (isset($_POST['wp_404_redirect_nonce']) && wp_verify_nonce($_POST['wp_404_redirect_nonce'], 'wp_404_redirect_nonce_action')) {
+        update_option('wp_404_redirect_enabled', isset($_POST['wp_404_redirect_enabled']) ? '1' : '0');
+        update_option('wp_404_redirect_target', esc_url_raw($_POST['wp_404_redirect_target']));
+        update_option('wp_404_redirect_type', sanitize_text_field($_POST['wp_404_redirect_type']));
+    }
+    $redirect_types = array(
+        301 => '301 (Moved Permanently)',
+        308 => '308 (Permanent Redirect)',
+        302 => '302 (Found)',
+        303 => '303 (See Other)',
+        307 => '307 (Temporary Redirect)'
+    );
+    ?>
+    <div class="wrap">
+        <h2>404 Redirect Settings</h2>
+        <form method="post">
+            <?php wp_nonce_field('wp_404_redirect_nonce_action', 'wp_404_redirect_nonce'); ?>
+            <table class="form-table">
+                <tr valign="top">
+                    <th scope="row">Redirect Target URL (Custom 404 Page)</th>
+                    <td>
+                        <input type="url" name="wp_404_redirect_target" value="<?php echo esc_url(get_option('wp_404_redirect_target')); ?>" />
+                    </td>
+                </tr>
+                <tr valign="top">
+                    <th scope="row">Redirect Type</th>
+                    <td>
+                        <select name="wp_404_redirect_type">
+                            <?php
+                            $selected_type = get_option('wp_404_redirect_type', 301);
+                            foreach ($redirect_types as $type => $label) {
+                                $selected = ($type == $selected_type) ? 'selected' : '';
+                                echo '<option value="' . $type . '" ' . $selected . '>' . $label . '</option>';
+                            }
+                            ?>
+                        </select>
+                    </td>
+                </tr>
+                <tr valign="top">
+                    <th scope="row">Enable Redirect</th>
+                    <td>
+                        <input type="checkbox" name="wp_404_redirect_enabled" value="1" <?php checked(get_option('wp_404_redirect_enabled'), '1'); ?> />
+                    </td>
+                </tr>
+            </table>
+            <?php submit_button(); ?>
+        </form>
+    </div>
+    <?php
+}
+
+function wp_404_redirect_redirect() {
+    if (get_option('wp_404_redirect_enabled') == '1') {
+        if (is_404()) {
+            $redirect_url = get_option('wp_404_redirect_target');
+            if (!empty($redirect_url)) {
+                $redirect_type = get_option('wp_404_redirect_type', 301);
+                wp_safe_redirect($redirect_url, $redirect_type);
+                exit();
+            }
+        }
+    }
+}
+
+add_action('admin_menu', 'wp_404_redirect_menu');
+add_action('template_redirect', 'wp_404_redirect_redirect');