binarygap.php

// Codility Bbinary Gap Test

function solution($N) {
    // write your code in PHP5.5
    $binaryNumber =  decbin($N); // binary conversion of number
    $trimmed = trim($binaryNumber, 0); // trim to remove trailing zeros
    $binaryGap =  explode("1",$trimmed); // explode 
    $binaryCount = array_map('strlen', $binaryGap);
    
    return max($binaryCount); // returns the longest binary gap
}