first commit

public/system/library/cache/file.php

@@ -0,0 +1,79 @@
+<?php
+namespace Cache;
+class File {
+	private $expire;
+
+	public function __construct($expire = 3600) {
+		$this->expire = $expire;
+
+		$files = glob(DIR_CACHE . 'cache.*');
+
+		if ($files) {
+			foreach ($files as $file) {
+				$filename = basename($file);
+
+				$time = substr(strrchr($file, '.'), 1);
+
+				if ($time < time()) {
+					$this->delete(substr($filename, 6, strrpos($filename, '.') - 6));
+				}
+			}
+		}
+	}
+
+	public function get($key) {
+		$files = glob(DIR_CACHE . 'cache.' . preg_replace('/[^A-Z0-9\._-]/i', '', $key) . '.*');
+
+		if ($files) {
+			$handle = fopen($files[0], 'r');
+
+			flock($handle, LOCK_SH);
+
+			$size = filesize($files[0]);
+
+			if ($size > 0) {
+				$data = fread($handle, $size);
+			} else {
+				$data = '';
+			}
+
+			flock($handle, LOCK_UN);
+
+			fclose($handle);
+
+			return json_decode($data, true);
+		}
+
+		return false;
+	}
+
+	public function set($key, $value) {
+		$this->delete($key);
+
+		$file = DIR_CACHE . 'cache.' . basename($key) . '.' . (time() + $this->expire);
+
+		$handle = fopen($file, 'w');
+
+		flock($handle, LOCK_EX);
+
+		fwrite($handle, json_encode($value));
+
+		fflush($handle);
+
+		flock($handle, LOCK_UN);
+
+		fclose($handle);
+	}
+
+	public function delete(string $key) {
+		$files = glob(DIR_CACHE . 'cache.' . basename($key) . '.*');
+
+		if ($files) {
+			foreach ($files as $file) {
+				if (!@unlink($file)) {
+					clearstatcache(false, $file);
+				}
+			}
+		}
+	}
+}