(PHP 3, PHP 4, PHP 5)
Returns an approximation of pi. The returned float has a precision based on the precision directive in php.ini, which defaults to 14. Also, you can use the M_PI constant which yields identical results to pi().
The value of pi as float.
Example 1. pi() example
<?phpecho pi(); // 3.1415926535898echo M_PI; // 3.1415926535898?>
Total time: 0.0425
