To turn off PHP error reporting you can use the following snippet in your PHP script:
Just remember to call this before any other PHP directive.
Alternatively, you can add this line to your .htaccess file (it is located in your public_html folder) to suppress any php error messages:
php_flag display_errors off
You can also turn off php error messages by going Member area -> Hosting control panel -> PHP configuration, choose Disabled for Display Errors.