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I have a simple equation written in PHP. I have tried to replicate the equation bellow.

When I work out the Equation on pager using the variables I have provided in the PHP I get 2,467.86 (using equation A).

But when I run it in PHP I get 4,2267.11, where have I gone wrong in my PHP ?

Equation A enter image description here

PHP Equation 

<?php $p = 0; $i = 0.06; $c = 12; $n = 1; $r = 200; $x = $i / $c; $y = pow((1 + $x), ($n * $c)); $vf = $p * $y + (($r * $y - 1) / $x); ?> <p>Answer:<?php echo $vf; ?></p>
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Here:

$vf = $p * $y + ($r * ($y - 1) / $x); // outputs 2467.1124745799

Your equation was:

$vf = $p * $y + (($r * $y - 1) / $x); // <- NOT $r*$y -1 , but $r*($y-1)

You can see it here - 3v4l

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