Parsing Multi-Select Profile Fields

[KGodel]

Hey everyone!

I have a Multiple-Selection Menu profile field I want to grab data from and compare (the raw data for a custom PHP script). I am not quite sure how the data is store or how I would go about parsing the data I get from the field and utilizing it how I want. Does anyone know how I might do this?

[kh99]

The data is stored as one number. You can think of it as a binary number where each bit represents one of your options. Look at this article: https://vborg.vbsupport.ru/showthread.php?t=250418 , specifically the section "For Multiple-Selection Menu and Multiple-Selection Checkbox", Method 2. The code for the plugin shows how you would check the value to see if each option is selected or not.

[KGodel]

So essentially, let's say I grab my user's info from the field and store it as $multilist. Could I simply change the code provided as;

if ($post['fieldx'] & 1)

to simply:

if ($multilist & 1)

and that would check for option one selected on my list? I am not quite sure how the php code is working there, so maybe that is why I am confused. Thanks for help though kh99!

Edit: So, this is essentially a bitwise operator, and by the code provided, I am essentially seeing if the bit in my variable (in this case bit 1 in the variable $multilist) is set, and if it is, then that means that the user has selected it, right?

Edit 2: It works! Thanks!

[Paul M]

So, this is essentially a bitwise operator, and by the code provided, I am essentially seeing if the bit in my variable (in this case bit 1 in the variable $multilist) is set

That is exactly correct, the single & in php is a bit operator, similarly | is a bitwise OR.