If only one of them is a number and the other a string, both will be treated as integers. 
$x = "161";       # a string
print $x & 255;   # the other one is a number...

[download]
Result: 
161

Assuming the "161" comes from user input and the 255 is hardcoded, there's no reason to have a problem.

In reply to Re^2: bitwise operators by bart
in thread bitwise operators by gtdunlap

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