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// 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 );