How to Use PHP’s tmpfile() to Create and Manage Temporary Files

In PHP, file handling often requires temporary files that should not persist after processing. The built‑in tmpfile() function creates a uniquely named temporary file that is automatically removed when the script ends or the handle is closed.

The function takes no arguments and returns a resource handle. Its syntax is: resource tmpfile ( void ) A typical usage pattern is:

<?php
$file = tmpfile(); // create temporary file
if ($file) {
    fwrite($file, 'Hello, World!'); // write data
    fseek($file, 0); // rewind pointer
    echo fread($file, filesize($file)); // read and output
    fclose($file); // close and delete file
}
?>

The handle can be passed to other file functions such as fwrite(), fseek(), fread(), and fclose(). Because the temporary file is removed automatically at script termination, manual deletion is usually unnecessary, but unlink() can be called if immediate removal is desired.

In summary, tmpfile() provides a convenient way to work with temporary files without managing filenames or cleanup, though the file exists only for the duration of the script execution.