php - "sprintf" sentence give me bad output -

i have line:

$lang = 'estimado %s, tiene un saldo disponible de <strong>%s</strong> usd para realizar llamadas'; 

then intended use sprintf function output right sentence, code:

$username = "somename"; $account = "13.1288"; sprintf($lang, $username, number_format($account, 2)); 

but output just:

somename 

what wrong?

sprintf doesn't print text, returns string.

you meant use printf instead, or can echo results of sprintf statement.