Question

How to get the constant PI value in PHP

Answer 1

echo "M_PI = " . M_PI . "<br />";
echo "M_PI * 2 = " . M_PI * 2 . "<br />";


/*
run: 

M_PI = 3.1415926535898
M_PI * 2 = 6.2831853071796

*/

 

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Answer 2

echo "pi() = " . pi() . "<br />";
echo "pi() * 2 = " . pi() * 2 . "<br />";


/*
run: 

pi() = 3.1415926535898
pi() * 2 = 6.2831853071796

*/

 

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