Question

How to get the base 2 (log2) logarithm in PHP

Answer 1

function log2($num) {
    return log($num, 2);
}
 
    
$n = 16;
echo log2($n) . "\n";
 
$n = 12;
echo log2($n) . "\n";
 
$n = 10;
echo log2($n) . "\n";


 
 
/*
run:
 
4
3.5849625007212
3.3219280948874
 
*/

 

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