TEMPNAM(3) 1 TEMPNAM(3)
tempnam - Create file with unique file name
SYNOPSIS
string tempnam (string $dir, string $prefix)
DESCRIPTION
Creates a file with a unique filename, with access permission set to 0600, in the specified directory. If the directory does not exist or
is not writable, tempnam(3) may generate a file in the system's temporary directory, and return the full path to that file, including its
name.
PARAMETERS
o $dir
- The directory where the temporary filename will be created.
o $prefix
- The prefix of the generated temporary filename.
Note
Windows uses only the first three characters of prefix.
RETURN VALUES
Returns the new temporary filename (with path), or FALSE on failure.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 4.0.3 | |
| | |
| | This function's behavior changed in 4.0.3. The |
| | temporary file is also created to avoid a race |
| | condition where the file might appear in the |
| | filesystem between the time the string was gener- |
| | ated and before the script gets around to creat- |
| | ing the file. Note, that you need to remove the |
| | file in case you need it no more, it is not done |
| | automatically. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
tempnam(3) example
<?php
$tmpfname = tempnam("/tmp", "FOO");
$handle = fopen($tmpfname, "w");
fwrite($handle, "writing to tempfile");
fclose($handle);
// do here something
unlink($tmpfname);
?>
NOTES
Note
If PHP cannot create a file in the specified $dir parameter, it falls back on the system default. On NTFS this also happens if the
specified $dir contains more than 65534 files.
SEE ALSO
tmpfile(3), sys_get_temp_dir(3), unlink(3).
PHP Documentation Group TEMPNAM(3)
