first release

wordpress-404-to-302-redirect.php

@@ -0,0 +1,103 @@
+<?php
+/**
+ * Plugin Name: WordPress 404 to 302 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-to-302-redirect
+ * Update URI: https://github.com/infinitnet/wordpress-404-to-302-redirect
+ * Version: 1.0
+ * License: GPLv3
+ * Text Domain: wordpress-404-to-302-redirect
+ */
+
+function wp_404_to_302_menu() {
+    add_options_page('404 to 302 Redirect Settings', '404 to 302 Redirect', 'manage_options', 'wp-404-to-302-redirect', 'wp_404_to_302_page');
+}
+
+function wp_404_to_302_page() {
+
+    ?>
+    <div class="wrap">
+      <h2>404 to 302 Redirect Settings</h2>
+      <form method="post" action="options.php">
+        <?php 
+        wp_nonce_field( 'wp_404_to_302_nonce_action', 'wp_404_to_302_nonce' );
+        settings_fields('wp-404-to-302-redirect-group');
+            do_settings_sections('wp-404-to-302-redirect-group');
+            ?>
+            <table class="form-table">
+                <tr valign="top">
+                    <th scope="row">Redirect Target URL (Custom 404 Page)</th>
+                    <td>
+                        <input type="url" name="wp_404_to_302_target" value="<?php echo esc_url(get_option('wp_404_to_302_target')); ?>" />
+                    </td>
+                </tr>
+                <tr valign="top">
+                <th scope="row">Enable Redirect</th>
+             <td>
+                 <input type="checkbox" name="wp_404_to_302_enabled" value="1" <?php checked( get_option('wp_404_to_302_enabled'), 1 ); ?> />
+             </td>
+             </tr>
+            </table>
+            <?php submit_button(); ?>
+        </form>
+    </div>
+    <?php
+
+  }
+
+function wp_404_to_302_settings() {
+
+    check_admin_referer( 'wp_404_to_302_nonce_action', 'wp_404_to_302_nonce' ); 
+
+    register_setting(
+      'wp-404-to-302-redirect-group', 
+      'wp_404_to_302_enabled',
+      'wp_404_to_302_target',
+      'wp_404_to_302_sanitize_target_url'
+    );
+
+  }
+
+  function wp_404_to_302_sanitize_target_url($input) {
+
+    if ( empty($input) ) {
+        add_settings_error(
+          'wp_404_to_302_target', 
+          'empty_url',
+          'Please enter a redirect URL.'
+        );
+        return get_option('wp_404_to_302_target');
+    }
+
+    if ( ! esc_url_raw($input) ) {
+      add_settings_error(
+        'wp_404_to_302_target',
+        'invalid_url',
+        'Please enter a valid redirect URL.'
+      );
+      return get_option('wp_404_to_302_target'); 
+    }
+
+    return esc_url_raw($input);
+
+  }  
+
+function wp_404_to_302_redirect() {
+    if ( ! get_option('wp_404_to_302_enabled') ) {
+        return;
+      }
+
+    if (is_404()) {
+        $redirect_url = get_option('wp_404_to_302_target');
+        if (!empty($redirect_url)) {
+            wp_safe_redirect($redirect_url, 302);
+            exit();
+        }
+    }
+}
+
+add_action('admin_menu', 'wp_404_to_302_menu');
+add_action('admin_init', 'wp_404_to_302_settings');
+add_action('template_redirect', 'wp_404_to_302_redirect');