[SOLVED] verify if var is bin/hexi/oct?

[smerny]

How can I verify if a variable is bin (includes only 1's and 0's and possibly a single decimal point)?

 

Same with octal having 0-7 and hexi having 0-F?

 

Pretty much I want it to work the same as the is_numeric() function does for base 10 numbers

[corbin]

Technically every number on a computer is stored in binary, so you won't be able to do it mathematically.

 

When you look at it as a string though, you can do something like:

 

if(preg_match('/^[0-1]+(?:\.[0-1]+)?$/', $number)) {

    //binary

}

 

The patterns for base 8:

 

/^[0-7]+(?:\.[0-7]+)?$/

 

 

Hex is a little more complicated since it has letters too:

 

/^[0-9|A-F]+(?:\.[0-9|A-F]+)?$/

[smerny]

Thought regex might be the solution... it's one of the things I have the most trouble trying to understand

 

 

works great, thanks

[corbin]

No problem .

[salathe]

Hex is a little more complicated since it has letters too:

 

/^[0-9|A-F]+(?:\.[0-9|A-F]+)?$/

The vertical pipe is not necessary, the character class [0-9A-F] will work just as well.