(PHP 4 >= 4.1.0, PHP 5)
vsprintf — Return a formatted string
Operates as sprintf() but accepts an array of arguments, rather than a variable number of arguments.
Return array values as a formatted string according to format (which is described in the documentation for sprintf()).
Example #1 vsprintf(): zero-padded integers
<?php
print vsprintf("%04d-%02d-%02d", explode('-', '1988-8-1')); // 1988-08-01
?>