A simple way to achieve pi in PHP [original]_php Tips

This article illustrates the simple method of realizing the pi in PHP. Share to everyone for your reference, specific as follows:

The previous article "C Language for PI" gives a simple calculation method of pi, here for reference to the previous code to the calculation method of the PHP pi. The specific code is as follows:

<?php
$t =1;
$pi =0;
$n =1.0;
$s =1;
while (ABS ($t) >1e-6)
{
 $pi = $pi + $t;
 $n = $n +2;
 $s =-$s;
 $t = $s/$n;
}
$pi = $pi *4;
printf ("pi=%10.6f", $pi);
? >

The result of the operation is:

Pi= 3.141591

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I hope this article will help you with the PHP program design.