Problem:
I'm trying to migrate data from Polylang to WPML but the migration is hanging. I check the debug log and see this error
PHP Fatal error: Uncaught TypeError: Cannot access offset of type string on string in .../wp-content/plugins/migrate-polylang-to-wpml-0.4/classes/class-mpw_migrate_posts.php:89
Solution:
This issue happens when using PHP 8.0, to fix this issue, please follow steps below:
- Create a backup of your database and website before proceeding.
- Edit the file: /wp-content/plugins/migrate-polylang-to-wpml-0.4/classes/class-mpw_migrate_posts.php in your WordPress directory.
- Find the following code:
list($trid, $post_type) = $this->set_original_post_language_details($relation, $default_language_code);
replace it with this one:
if( !is_array( $relation ) ) {
continue;
}
list($trid, $post_type) = $this->set_original_post_language_details($relation, $default_language_code);
if (count($relation) == 1) {
continue;
}
- Find the following code:
$original_post_id = isset($relation['sync']) ? $relation['sync'][$default_language_code['polylang']] : $relation[$default_language_code['polylang']];
replace it with this one:
$original_post_id = (isset($relation['sync']) ? $relation['sync'][$default_language_code['polylang']] : isset($relation[$default_language_code['polylang']])) ? $relation[$default_language_code['polylang']] : reset($relation);
if ($original_post_id === NULL ) {
$original_post_id = reset ($relation);
}
- Save the file and rerun the import.
Relevant Documentation:
https://wpml.org/documentation/related-projects/migrate-polylang-wpml/
