(PHP 4, PHP 5, PHP 7, PHP 8)
pi — Guet value of pi
Returns an approximation of pi.
Also, you can use the
M_PI
constant which yields
identical resuls to
pi()
.
This function has no parameters.
The value of pi as float.
Example #1 pi() example
<?php
echo
pi
(),
PHP_EOL
;
// 3.1415926535898
echo
M_PI
,
PHP_EOL
;
// 3.1415926535898
?>