> On Mar 17, 2020, at 11:08 AM, Christoph M. Becker <cmbecker69@xxxxxx> wrote: > > On 17.03.2020 at 18:40, Jeffry Killen wrote: > >> Hello; >> >> This must be the first time I have encountered this: >> >> I have an html interface with text input fields for >> entering file names. The underlying javascript >> sends and async request to verify that the file >> exists on the server >> >> I have used both is_file and file_exists. >> >> If I use wrong case in the file name but the location/name >> is correct both the php functions return true. >> >> That would indicate that they are not case >> sensitive in matching a file name. >> >> How can I make them case sensitive? >> >> If I go to open and read or write to the >> file and it has wrong case in the file name >> I am expecting that the read/write or unlink, >> or other file processing function will not work. > > That depends on the file system (and is not particularly related to > PHP). Windows (NTFS) is case insensitive, Linux usually case sensitive, > and AFAIK on MacOS this can be somehow configured. > > -- > Christoph M. Becker Response to Both Christoph and Ashley: My dev platform is MacOS. I am getting the idea that case sensitivity in file names is a blessing and a curse: I uploaded a file named the same as an existing file but with one letter set upper case, via FTP client, and the file system (localhost) accepted it. I did this to see if two files with the same name accept for character case could exist in the same directory. It WAS accepted. Then I delete the uploaded file and tested my system. The original was not found by my testing code. I reloaded the FTP window and the original was GONE. I also have an upload facility programmed into my CMS system. I tried to upload the file with the altered name and it was rejected because the file already exists. I also tried an on the fly script to make a file with the same name but with an altered character case. file_put_content(alteredFilename, '<?php?>') overwrote the existing file. So I am getting the idea that none of the file related functions are case sensitive. So a file with the same name in the same location, but with case differences could not exist as far a php is concerned. But using FTP client to upload a test case was successful, apparently. My FTP client is Fetch.
