Remove warning messages in PHP

Question

You really should fix whatever's causing the warning, but you can control visibility of errors with error_reporting(). To skip warning messages, you could use something like:

error_reporting(E_ERROR | E_PARSE);

You can put an @ in front of your function call to suppress all error messages.

@yourFunctionHere();

To suppress warnings while leaving all other error reporting enabled:

error_reporting(E_ALL ^ E_WARNING); 

If you don't want to show warnings as well as errors use

// Turn off all error reporting
error_reporting(0);

Error Reporting - PHP Manual

If you want to suppress the warnings and some other error types (for example, notices) while displaying all other errors, you can do:

error_reporting(E_ALL & ~E_WARNING & ~E_NOTICE);

in Core Php to hide warning message set error_reporting(0) at top of common include file or individual file.

In Wordpress hide Warnings and Notices add following code in wp-config.php file

ini_set('log_errors','On');
ini_set('display_errors','Off');
ini_set('error_reporting', E_ALL );
define('WP_DEBUG', false);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);