The WordPress cron system handles scheduled tasks that your website and plug-ins require to function. By design the creators of WordPress handle the cron system internally processing these scheduled tasks with every page load. Due to this the WordPress cron feature is open to outside DDoS attack and performance issues due to how frequently it runs. In most cases it is suggested you modify the WordPress script and use the cPanel cron system instead.
Before we add the cPanel cron job you will need to edit your WordPress 'wp-config.php' file and disable the internal cron system. This article uses the cPanel File Manager to edit and make the required change to the 'wp-config.php' file.
First you will need to access your accounts cPanel interface and locate the 'File Manager' section. You can use the search box at the top of the cPanel interface to find the File Manager.
When you are inside the 'File Manager' you will need to locate your 'wp-config.php' file, for most clients this is located within the public_html directory. If this is an add-on domain you will need to navigate to your website document directory where the WordPress files are located. You would click on the 'wp-config.php' file once and then use the 'Edit' button at the top to open the file.
When the file is open for editing you will need to add the following code in the location outlined in the image below. Remember to click 'Save Changes' once the code is added to the file.
After saving the changes to the 'wp-config.php' file it is now time to add the cPanel cron job. Go to the cPanel interface home page and locate the 'Cron Jobs' section.
In the 'Add New Cron Job' section you would first select 'Twice Per Hour (0,30 * * * *)' under the 'Common Settings' drop-down.
You then add the following text in the box under the 'Command:' section. Please note if your site is not in public_html you will enter the folder name where the site is located.
php -q ~/public_html/wp-cron.php > /dev/null
After clicking 'Add New Cron Job' the process is complete.