format(1.5555,0)	format(123.5555,1)	format(1234.5555,2)	format(12345.5555,3)	format(123456.5555,4)	format(1234567.5555,5)	format("12345.2399",2)
2	123.6	1,234.56	12,345.556	123,456.5555	1,234,567.55550	12,345.24
inet_ntoa(inet_aton("255.255.255.255.255.255.255.255"))
255.255.255.255.255.255.255.255
inet_aton("255.255.255.255.255")	inet_aton("255.255.1.255")	inet_aton("0.1.255")
1099511627775	4294902271	511
inet_ntoa(1099511627775)	inet_ntoa(4294902271)	inet_ntoa(511)
255.255.255.255.255	255.255.1.255	0.0.1.255