WordPress FAQ

GENERAL

  • ServerName not found 

    • Msg:

      • FQDN not found

      • mysqli connection exception, server name not found

    • Ans:

      • Rebuild wordpress after cleaning all old data on disk

  • Write parameter debug log 

$sudo vi ./your_wp_html/wp-includes/functions.php

---  functions.php ---
...
/**
* Simple helper to debug to the console
*
* @param $data object, array, string $data
* @param $context string  Optional a description.
*
* @return string
*/
function debug_to_console($data, $context = 'Debug in Console') {
    // Buffering to solve problems frameworks, like header() in this and not a solid return.
    ob_start();

    $output  = 'console.info(\'' . $context . ':\');';
    $output .= 'console.log(' . json_encode($data) . ');';
    $output  = sprintf('<script>%s</script>', $output);

    echo $output;
}
...
------


# Now Usage in any .php file


debug_to_console($xxx)


Result:

POSTS

  • Order posts by last modified/update date

$sudo vi {your_wp_html}/wp-content/themes/{your_current_theme}/functions.php

---  functions.php ---
...
# Remove `$query->is_main_query()` check if needs 
function lmt_orderby_modified_posts( $query ) {
    if( $query->is_main_query() && !is_admin() ) {
        if ( $query->is_home() || $query->is_category() || $query->is_tag() ) {
            $query->set( 'orderby', 'modified' );
            $query->set( 'order', 'desc' );
        }
    }
}
add_action( 'pre_get_posts', 'lmt_orderby_modified_posts' );
...
------

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