printf %.4f for IP?

I would like to print an IP in fixed way.. example

12.12.1.0

would tured to

012.012.001.000

what's t开发者_开发技巧he best method do it ?

printf("%.4f.%.4f.%.4f.%.4f",$ip); ?

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With zero padding:

$ip = "12.12.1.0";

vprintf("%03d.%03d.%03d.%03d", explode('.', $ip));