// open this directory 
$myDirectory = opendir(".");

// get each entry
while($entryName = readdir($myDirectory)) {
	$dirArray[] = $entryName;
}

// close directory
closedir($myDirectory);

//	count elements in array
$indexCount	= count($dirArray);
Print ("$indexCount files<br>\n");

// sort 'em
sort($dirArray);

// print 'em
print("<TABLE border=1 cellpadding=5 cellspacing=0 class=whitelinks>\n");
print("<TR><TH>Filename</TH><th>Filetype</th><th>Filesize</th></TR>\n");
// loop through the array of files and print them all
for($index=0; $index < $indexCount; $index++) {
        if (substr("$dirArray[$index]", 0, 1) != "."){ // don't list hidden files
		print("<TR><TD><a href=\"$dirArray[$index]\">$dirArray[$index]</a></td>");
		print("<td>");
		print(filetype($dirArray[$index]));
		print("</td>");
		print("<td>");
		print(filesize($dirArray[$index]));
		print("</td>");
		print("</TR>\n");
	}
}
print("</TABLE>\n");

http://www.liamdelahunty.com/tips/php_list_a_directory.php

To make an image browser, add these lines:

$ext = strtolower(substr("$dirArray[$index]", strrpos("$dirArray[$index]", '.') + 1)); //get file extensions

if ("$ext" == "jpg") { // if file is a jpg

print("<TR><TD>$dirArray[$index]<br/><a href=\"$dirArray[$index]\"><img></a></td>"); // show image and create link to it

List Contents of a Directory

php

PHP