Remove Query Strings From Static Resources

You can also remove query strings from your assets with code. Simply add the following to your WordPress theme’s functions.php file.

function _remove_script_version( $src ){ 
$parts = explode( '?', $src ); 	
return $parts[0]; 
} 
add_filter( 'script_loader_src', '_remove_script_version', 15, 1 ); 
add_filter( 'style_loader_src', '_remove_script_version', 15, 1 );