Wordpress Parallax-One theme

11:11 issue , Parallax-One , PHP , plugin , Wordpress 1 Comments

We use quite cool Parallax-One theme for our cloud representation website. But recently I had the issue after changed website hostname.

All uploaded resources, like http://hostname/wp-content/uploads/2016/08/icon8.png, were linked to old hostname. The theme saved links in wordpress option "theme_mods_Parallax-One", and does not renew it after moving to new hostname.

First thought is quick fix by updating this option directly in database:

mysql -u root -p
mysql> use  wordpress;
mysql> select option_id, option_value from wp_options where option_name = 'theme_mods_Parallax-One'
mysql> | 169 | a:35:{i:0;b:0;s:26:"parallax_one_logos_content";
       s:1255:"[{"text":"undefined","link":"#",
       "image_url":"http:\/\/old_hostname\/wp-content\/uploads\/2016\/08\/turnkey_logo.jpg",
       "title":"undefined","subtitle": ...

But wp_options are PHP serialized objects, so if length of new_hostname and old_hostname is not equal, you have got a problem. You have to change length of the string encoded as follows:

s:<string length>:"string value"

And if there is missmatched something - theme will not load.

So let me introduce a little addition to Parallax-One theme. This patch adds input field 'Uploads Resource Hostname' to the inc/customizer.php. On saving changes it updates all upload URL hostnames to the specified hostname.

--- /root/customizer.php        2016-10-07 07:50:12.044940980 +0000
+++ customizer.php      2016-10-10 07:56:31.812266652 +0000
@@ -903,6 +903,36 @@
                'section'               => 'parallax_one_general_section',
                'priority'      => 12,
        ));
+
+        /** FIX change uploads resources hostname **/
+       $wp_customize->add_setting( 'parallax_one_uploads_hostname', array(
+               'sanitize_callback' => 'parallax_one_sanitize_input',
+                'validate_callback' => 'update_uploads_hostname',
+                'transport' => 'postMessage'
+       ));
+       $wp_customize->add_control( 'parallax_one_uploads_hostname', array(
+               'label'                 => esc_html__('Uploads Resource Hostname','parallax-one'),
+               'section'               => 'parallax_one_general_section',
+               'priority'      => 13,
+       ));
+        function update_uploads_hostname($validity, $value) {
+          if (!isset($value) || $value == "" || $value == $_SERVER['HOST_NAME']) return $validity;
+          $mods = get_option("theme_mods_Parallax-One");
+          $replace = function (&$url, $new_hostname) {
+            $url = preg_replace('/(http[s]?:(\\\\)?\/(\\\\)?\/)[^\\\\\/]+((\\\\)?\/wp-content(\\\\)?\/uploads)/', "$1$new_hostname$4", $url);
+            $url = preg_replace('/((http[s]?:)?(\\\\)?\/(\\\\)?\/)[^\\\\\/]+((\\\\)?\/wp-content(\\\\)?\/themes)/', "$1$new_hostname$5", $url);
+          };
+          foreach (array_keys($mods) as $key) {
+            if (is_string($mods[$key])) $replace($mods[$key], $value);
+            if (is_object($mods[$key])) { //for URLs in attachments, saved as objects, go through all string properties
+              foreach ($mods[$key] as $prop=>$pvalue) {
+                if (is_string($pvalue)) $replace($mods[$key]->$prop, $value);
+              }
+            }
+          }
+          update_option( "theme_mods_Parallax-One", $mods );
+          return $validity;
+        }


        /*********************************/