first commit

public/system/library/session/file.php

@@ -0,0 +1,77 @@
+<?php
+namespace Session;
+class File {
+	private $directory;
+
+	public function read($session_id) {
+		$file = DIR_SESSION . '/sess_' . basename($session_id);
+
+		if (is_file($file)) {
+			$handle = fopen($file, 'r');
+
+			flock($handle, LOCK_SH);
+
+			$data = fread($handle, filesize($file));
+
+			flock($handle, LOCK_UN);
+
+			fclose($handle);
+
+			return unserialize($data);
+		} else {
+			return array();
+		}
+	}
+
+	public function write($session_id, $data) {
+		$file = DIR_SESSION . '/sess_' . basename($session_id);
+
+		$handle = fopen($file, 'w');
+
+		flock($handle, LOCK_EX);
+
+		fwrite($handle, serialize($data));
+
+		fflush($handle);
+
+		flock($handle, LOCK_UN);
+
+		fclose($handle);
+
+		return true;
+	}
+
+	public function destroy($session_id) {
+		$file = DIR_SESSION . '/sess_' . basename($session_id);
+
+		if (is_file($file)) {
+			unlink($file);
+		}
+	}
+
+	public function __destruct() {
+		if (ini_get('session.gc_divisor')) {
+			$gc_divisor = ini_get('session.gc_divisor');
+		} else {
+			$gc_divisor = 1;
+		}
+
+		if (ini_get('session.gc_probability')) {
+			$gc_probability = ini_get('session.gc_probability');
+		} else {
+			$gc_probability = 1;
+		}
+
+		if ((rand() % $gc_divisor) < $gc_probability) {
+			$expire = time() - ini_get('session.gc_maxlifetime');
+
+			$files = glob(DIR_SESSION . '/sess_*');
+
+			foreach ($files as $file) {
+				if (filemtime($file) < $expire) {
+					unlink($file);
+				}
+			}
+		}
+	}
+}