PHP convert byte string into integer

Question

I am trying to convert a 2 byte string into a Short/int data type with unpack but it does not seem to work:

$str = "\x01\xBB";
unpack("S",$str);

it gives 47873 where as it must return 443

Why did you use S when your string seemingly requires big-endian unpacking? — mario
– mario, Commented Sep 6, 2014 at 21:29

ElefantPhace · Accepted Answer · 2014-09-06 21:42:12Z

6

You need to use n as the format string instead.

$str = "\x01\xBB";
unpack("n",$str);

answered Sep 6, 2014 at 21:42

ElefantPhace

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