Question

How to count the total bits of a number in PHP

Answer 1

function totalBits($num) {
    return (int)log($num, 2) + 1;
}
 
    
$n = 12; // 1100 
 
echo totalBits($n) . "\n";
 
$n = 386; // 1 1000 0010
 
echo totalBits($n) . "\n"
 

 
 
/*
run:
 
4
9
 
*/

 

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