[Code] PHP - Random Functions

[Jacob]

Math:
<?php
function distance($x1, $y1, $x2, $y2)
{
$x = pow($y2 - $y1, 2);
$y = pow($x2 - $x1, 2);
$distance = sqrt($x + $y);
return $distance;
}
function midpoint($x1, $y1, $x2, $y2)
{
$x = ($x1 + $x2)/2;
$y = ($y1 + $y2)/2;
$midpoint = $x + $y;
return $midpoint;
}
function calculate($equation)
{
$equation = ereg_replace('([A-Z]|[a-z])', '', $equation);
$answer = eval('return '.$equation.';');
return $answer;
}
?>

Text:
<?php
function alternating_caps($text)
{
$x = 1;
for($i = 0; $i < strlen($text); $i++)
{
if($x == 1)
{
$text{$i} = strtoupper($text{$i});
$x = 2;
}
elseif($x == 2)
{
$x = 1;
}
}
return $text;
}
function random_caps($text)
{
for($i = 0; $i < strlen($text); $i++)
{
$x = round(rand(0, 1));
if($x == 1)
{
$text{$i} = strtoupper($text{$i});
}
elseif($x == 2)
{
}
}
return $text;
}