Help with shorting this please

PHP gurus. I know this can be made shorter but I can't seem to figure out how. This is a PHP CLI script I use to go through a directory listing a act upon file matching the same prefix and/or suffix if supplied. This is the code I use now. // set up the prefix and/or suffix if I want to match on certain files $deleteprefix = ""; $deletesuffix = ""; // Open the folder $dir_handle = @opendir($rootpath) or die("Unable to open ".$rootpath." hot folder\n"); // Loop through the files while ($file = readdir($dir_handle)) { if (substr($file,0,1) <> ".") { // tests if (($deleteprefix == "") and ($deletesuffix == "")) { // if both are empty just send anything logger("Deleted: ".$file." Last Modified: ".date("F j, Y ",filemtime($rootpath.$file))); unlink($rootpath.$file); } elseif (($deleteprefix != "") and ($deletesuffix != "")) { // if both have something test both if ((substr($file,0,strlen($deleteprefix)) == $deleteprefix) and (substr($file,-strlen($deletesuffix)) == $deletesuffix)) { logger("Deleted: ".$file." Last Modified: ".date("F j, Y ",filemtime($rootpath.$file))); unlink($rootpath.$file); } } elseif (($deleteprefix == "") and ($deletesuffix != "")) { // if prefix is empty but suffix is not if (substr($file,-strlen($deletesuffix)) == $deletesuffix) { logger("Deleted: ".$file." Last Modified: ".date("F j, Y ",filemtime($rootpath.$file))); unlink($rootpath.$file); } } elseif (($deleteprefix != "") and ($deletesuffix == "")) { // if suffix is empty but prefix is not if (substr($file,0,strlen($deleteprefix)) == $deleteprefix) { logger("Deleted: ".$file." Last Modified: ".date("F j, Y ",filemtime($rootpath.$file))); unlink($rootpath.$file); } } } } As you can see I test the filename 4 times depending on if the prefix or suffix was supplied. Can somebody help me make this shorter? I don't think all those tests are necessary if I could figure out the syntax. DMyers