php poker problem

[KillerBeeZ]

I am working on a small poker program for my site in PHP.

I have many of the hands scripted and ready, but pairs, full houses and trips are being a pain.

The problem area is in the pairs, sometimes it shows up that its a pair on the site, and other times not (even if there is definatly a pair... see attatched image).

this is the problem area (sorry for not putting it in code box, it wont let me do so without deleting the $c1n and such)

// Pair
else if ($c1n == $c2n | $c1n == $c3n | $c1n == $c4n | $c1n == $c5n)
{
echo ("<br><b><h2>Pair - No Prize</h2>");
}
else if ($c2n == $c3n | $c2n == $c4n | $c2n == $c5n)
{
echo ("<br><b><h2>Pair - No Prize</h2>");
}
else if ($c3n == $c4n | $c3n == $c5n)
{
echo ("<br><b><h2>Pair - No Prize</h2>");
}
else if ($c4n == $c5n)
{
echo ("<br><b><h2>Pair - No Prize</h2>");
}

echo ("<br>CN - c1n = $c1n, c2n = $c2n, c3n = $c3n, c4n = $c4n, c5n = $c5n<br>CS - c1s = $c1s, c2s = $c2s, c3s = $c3s, c4s = $c4s, c5s = $c5s<br>Cards - C1 = $c1, c2 = $c2, c3 = $c3, c4 = $c4, c5 = $c5");


As you can see in the image, there is a pair of Queens. The debugging info below the cards "CN - c1n = 13, c2n = 12, c3n = 2, c4n = 11, c5n = 12" show that c2n and c5n are both 12 (queen) the code above "else if ($c2n == $c3n | $c2n == $c4n | $c2n == $c5n)" more specifically "$c2n == $c5n" shows that the statement should be true right? if so the echo code should be displayed... yet its not.

Now, keep in mind that I am new to PHP. I thank my C# background for allowing me to get this far, but maybe I screwed it up somewhere where php is different than C#

Any help you can give me as to why this is happening and/or how to fix it will be appreciated.

[PerfectWing]

It's been a very, very long time since I've coded in any PHP, but could it maybe have something to do with using a bitwise operator | (or) as opposed to the logical operator || (or)?