I don't know php code :(
It looks like your returning a decimal value, at some point you will need to check the bit values of that.
also is that returning the offset in the record after converting the escape sequences in the blob like /0 to hex value 0 do you need to use the unpack() function mentioned in another thread.
I'm really a bad one to answer this, I only know enought to be dangerous :p you can try asking Windcatcher or Lyenu X`Arie having done admin tools they should be better to help you out.
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