List All of a Certain File Type in a Directory

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//USAGE:
listFiles("/web_directory/". ".jpg");

function listFiles( $dir. $type ) {
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if (is_file($dir.$file)) {
if (strchr($file. ".") == $type) {
echo "<a href='".$path.$file."'>".$file."</a><br/>\n";
}
}
}
closedir($dh);
}
}
}

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