If upload_tmp_dir has no value... where do my temp files go? -- experiments
php
Solution
It will most likely use the system's tmp directory. But to really find out you should inspect the output of `<?php phpinfo() ?>`. You can put it onto a `info.php` file or similar and open that file's URL in your browser. It will tell you all the configuration values; even defaults.
You can also use `sys_get_temp_dir()` to find out the location of the temp directory.
Problem
I'm really just messing around and learning more about PHP, but I stumbled upon something that kinda threw me for a loop. I'm hoping I could just get some insight on the conundrum. Basically I'm just trying to discovering mimetypes for uploaded images - and like the subject line asks: if upload_tmp_dir has no value, where (in the internets) do my temp files end up? I should mention that it does tell me my mimetypes! So partly a success! And here are some of my specs: I'm running PHP 5.3+ and my upload_tmp_dir has no value - I did read another post from 2008 that suggested var_dump might help but it only returns an empty array. ``` <?php if(empty($_FILES)){ echo "nothing in files array -- ignore warning, testing only" . "<br /><br />"; } $finfo = new finfo(FILEINFO_MIME_TYPE); $fileContents = file_get_contents($_FILES['upload']['tmp_name']); // check tmp dir for $mimeType = $finfo->buffer($fileContents); echo $mimeType . "<br /><br />"; echo var_dump($_FILES) . "<br /><br />"; ?> <form action="" method="post" enctype="multipart/form-data"> <p> <label id="upload">Select a file to upload: <input type="hidden" name="MAX_FILE_SIZE" value="1048576"> <input type="file" id="upload" name="upload"> </label> </p> <p> <input type="hidden" name="action" value="upload"> <input type="submit" value="Submit"> </p> </form> ``` Thanks everyone!