Remove Query Strings to Optimize Page Speed. Put in functions.php
// Remove Query Strings to Optimize Page Speed
function _remove_query_strings_1( $src ){
$rqs = explode( '?ver', $src );
return $rqs[0];
}
function _remove_query_strings_2( $src ){
$rqs = explode( '&ver', $src );
return $rqs[0];
}
add_filter( 'script_loader_src', '_remove_query_strings_1', 15, 1 );
add_filter( 'style_loader_src', '_remove_query_strings_1', 15, 1 );
add_filter( 'script_loader_src', '_remove_query_strings_2', 15, 1 );
add_filter( 'style_loader_src', '_remove_query_strings_2', 15, 1 );