Question

How to use log() function to calculate the natural base e logarithm in PHP

Answer 1

echo "log(1) = " . log(1) . "<br />";
echo "log(5) = " . log(5) . "<br />";
echo "log(100) = " . log(100) . "<br />";
echo "log(125) = " . log(125) . "<br />";    
echo "log(125) / log(5) = " . log(125) / log(5) . "<br />";
echo "log(3.5) = " . log(3.5) . "<br />";


/*
run: 

log(1) = 0
log(5) = 1.6094379124341
log(100) = 4.6051701859881
log(125) = 4.8283137373023
log(125) / log(5) = 3
log(3.5) = 1.2527629684954

*/

 

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