file_exists() case sensitivity

[tarsus]

Is the case sensitivity of file_exists() determined merely by the operating system? (i.e., is the result case sensitive on Linux because that OS's file system is?)

If that's the case, is there a good way to do a case INsensitive check for the existence of a file on Linux? Or is this a case, like most concerning this issue, where a workaround would be complicated and sticky?

[Znupi]

The only way I see it is by going through all the files in the directory where you want to check if the file exists and check each one with strtolower($dirfile) == strtolower($checkfile). Tell us if you need help with that.

[tarsus]

Doubt that I will go to that length to accomplish it. But you are confirming that the simple function is case sensitive on Linux, right?

[Znupi]

Yes. But it's not hard to do what I said. Here's a function you can use just like you use file_exists:

function file_iexists($path) {
$dirname = dirname($path);
$filename = basename($path);
$dir = dir($dirname);
while ( ($file = $dir->read()) !== false) {
if (strtolower($file) == strtolower($filename)) {
$dir->close();
return true;
}
}
$dir->close();
return false;
}

Try that :)

Edit: That won't work if you got the directory name in the wrong case. Explanation:

// Say we have the file: /path/to/FILE.txt
file_iexists('/path/to/file.txt'); // true
file_iexists('/PATH/TO/FILE.txt'); // false