Create file with unique file name

# tempnam

(PHP 4, PHP 5, PHP 7)

tempnam — Create file with unique file name

### Descrierea

tempnam ( string `$dir` , string `$prefix` ) : string

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() may generate a file in the system's temporary directory, and return the full path to that file, including its name.

### Parametri

`dir`

  The directory where the temporary filename will be created.

`prefix`

  The prefix of the generated temporary filename.

  > Notă: Windows uses only the first three characters of prefix.

### Valorile întoarse

Returns the new temporary filename (with path), or `FALSE` on failure.

### Istoricul schimbărilor

Versiune | Descriere
--- | ---
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 generated and before the script gets around to creating the file. Note, that you need to remove the file in case you need it no more, it is not done automatically.

### Exemple

Example #1 tempnam() example

`<?php
$tmpfname = tempnam("/tmp", "FOO");
$handle = fopen($tmpfname, "w");
fwrite($handle, "writing to tempfile");
fclose($handle);
// do here something
unlink($tmpfname);
?>`

### Note

> Notă: 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.

### A se vedea și

- tmpfile() - Creates a temporary file
- sys_get_temp_dir() - Returns directory path used for temporary files
- unlink() - Deletes a file