PHP check file exists without knowing the extension - php

Question

I need to check if a file exists but I don't know the extension.
IE I would like to do:
if(file_exists('./uploads/filename')):
// do something
endif;
Of course that wont work as it has no extension. the extension will be either jpg, jpeg, png, gif
Any ideas of a way of doing this without doing a loop ?

Answer 1

You would have to do a glob():
$result = glob ("./uploads/filename.*");
and see whether $result contains anything.

Answer 2

I've got the same need, and tried to use glob but this function seems to not be portable :
See notes from http://php.net/manual/en/function.glob.php :
Note: This function isn't available on some systems (e.g. old Sun OS).
Note: The GLOB_BRACE flag is not available on some non GNU systems, like Solaris.
It also more slower than opendir, take a look at : Which is faster: glob() or opendir()
So I've made a snippet function that does the same thing :
function resolve($name) {
// reads informations over the path
$info = pathinfo($name);
if (!empty($info['extension'])) {
// if the file already contains an extension returns it
return $name;
}
$filename = $info['filename'];
$len = strlen($filename);
// open the folder
$dh = opendir($info['dirname']);
if (!$dh) {
return false;
}
// scan each file in the folder
while (($file = readdir($dh)) !== false) {
if (strncmp($file, $filename, $len) === 0) {
if (strlen($name) > $len) {
// if name contains a directory part
$name = substr($name, 0, strlen($name) - $len) . $file;
} else {
// if the name is at the path root
$name = $file;
}
closedir($dh);
return $name;
}
}
// file not found
closedir($dh);
return false;
}
Usage :
$file = resolve('/var/www/my-website/index');
echo $file; // will output /var/www/my-website/index.html (for example)
Hope that could helps someone,
Ioan