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Log base 2 in PHP

Discussion in 'PHP' started by NoamBarz, Apr 15, 2008.

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  1. #1
    I need to find the log base 2 of a number. Is there a built in PHP function that can help? I was only able to find log base E or log base 10.
    Thanks...
     
    NoamBarz, Apr 15, 2008 IP
  2. NoamBarz

    NoamBarz Active Member

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    #2
    I got it. Sorry.
    The answer I came up with is:

    function Log2($x){
    return (log10($x) / log10(2));
    }

    Can anyone think of a better solution?
     
    NoamBarz, Apr 15, 2008 IP
  3. jayshah

    jayshah Peon

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    #3
    jayshah, Apr 15, 2008 IP