vb.org Archive - Decoding Bitfield for Custom Use

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- - Decoding Bitfield for Custom Use (https://vborg.vbsupport.ru/showthread.php?t=153786)

Muppettt

07-30-2007 12:15 PM

Decoding Bitfield for Custom Use

Hey,

I'm currently making a custom usercp (outwith vB but including certain parts/files into it). I'm trying to reproduce the options page and notice vB stores all the option data into a bitfield.

How can i 'decode' the bitfield to show what options a user currently has set? I know i can select the data using

PHP Code:


		
			
SELECT username, email FROM user WHERE options & 16

so that would display everyone with adminemail set to ON, but how would i make it so that it pulls the options bitfield and 'decode' that to show what features the user currently has ON (as in text outputs - 16 = Receive Admin Emails). I assume there would be an array somewhere with all the pertinent data?

And i assume for UPDATING the user table with the a new adminemail option (if changed) it would be:

PHP Code:


		
			
UPDATE user SET options = options - 16 WHERE (options & 16) AND userid = 123

Muppettt

08-01-2007 03:29 PM

Anyone?

Marco van Herwaarden

08-01-2007 03:57 PM

You can find most bitfield values in Updating Options En Masse with Queries

-=Sniper=-

08-01-2007 06:01 PM

excellent :) thanks that might come in use.

Marco van Herwaarden

08-01-2007 07:11 PM

It has been there for a very long time. ;)

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