Just a short function to convert binary to decimal using logs. Input decimal and specify number of bits in output. Default lenght of 8 bits. Auto adjusts for numbers larger than specified output.

By : bjpalmer

function decToBin ($decimal, $bits=8)
{
$binaryString = "";
if($decimal>(pow(2, $bits)-1))
{
$bits = ceil(log10($decimal + 1) / log10(2));
}
for($i=0; $i<$bits; $i++)
{
$binary[$i] = 0;
}
while($decimal > 0)
{
$power = (integer) (log10($decimal) / log10(2));
$binary[$power] = 1;
$decimal = $decimal - pow(2, $power);
}
for($i=($bits-1); $i>=0; $i--)
{
$binaryString = $binaryString.$binary[$i];
}
return $binaryString;
}

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