Math Php

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  4. Calculate logarithms with other base values by dividing the result of the log() function with log(base)
$val = 100;
$i = log($val);
echo "log($val) = $i\n";
$i10 = log($val) / log(10);
echo "log($val) / log(10) = $i10\n";
$i10 = log10($val);
echo "log10($val) = $i10\n";
?>