<a href="list.php?name=alpha" name="alpha"><img src="1.jpg" name="image1" border="0"></a><br>
<a href="list.php?name=beta" name="beta"><img src="2.jpg" name="image1" border="0"></a>
<a href="list.php?name=gamma" name="gamma"><img src="3.jpg" name="image1" border="0"></a>
On the called page (list.php), just do the comparison to the superglobal $GET['name'] variable you defined in your link. There are a few ways to do this...
If($_GET['name'] == "alpha") {
//do this
} elseif($_GET['name'] == "beta") {
//do this
} repeat the elseifs for each choice possibility.
OR
Have several php pages like alpha.php, beta.php, gamma.php, etc...
include("$_GET['name'].php");
OR you can use a switch/case