Temporary directory deleted when PHP ends.

TempDir.php

<?php

/**
 * Temporary directory deleted when PHP ends.
 *
 * @author Jérôme Tamarelle <jerome@tamarelle.net>
 */
final class TempDir
{
    private static $instances = array();
    private $path;

    /**
     * Delete all created directories.
     */
    public static function purge()
    {
        self::$instances = array();
    }

    /**
     * Create a directory with an unique name
     * 
     * @param string $dir The directory where the temporary directory will be created.
     * @param string $prefix The prefix of the generated temporary directory.
     * 
     * @return string Path to the new temp directory
     */
    public static function create(string $dir = null, string $prefix = null)
    {
        return strval(new self($dir, $prefix));
    }

    /**
     * Create a directory with an unique name
     * 
     * @param string $dir The directory where the temporary directory will be created.
     * @param string $prefix The prefix of the generated temporary directory.
     */
    private function __construct(string $dir = null, string $prefix = null)
    {
        $this->path = tempnam($dir ?: sys_get_temp_dir(), $prefix ?: '');
        unlink($this->path);
        mkdir($this->path);
        self::$instances[] = $this;
    }

    /**
     * Delete the directory when it's over.
     */
    private function __destruct()
    {
        exec(sprintf('rm -rf "%s"', $this->path));
    }

    private function __toString()
    {
        return $this->path;
    }
}

zexample.php

<?php 

include 'TempDir.php';

$dir = TempDir::create();
var_dump(is_dir($dir)); // True
touch($dir.'/file1'); // OK
TempDir::purge();
var_dump(is_dir($dir)); // False but PHP says True
touch($dir.'/file2'); // Error