refactor: more powerful .env settings

.env.example

@@ -0,0 +1,9 @@
+# Bot Settings
+BOT_NAME=
+BOT_TOKEN=
+
+# Redis Settings
+REDIS_HOST=127.0.0.1
+REDIS_PORT=6379
+REDIS_PASSWD=
+REDIS_PREFIX=tgbot

main.php

@@ -51,7 +51,10 @@ function loadEnv() { // 载入环境变量
     $file = fopen('.env', 'r');
     $data = array();
     while (!feof($file)) { // 逐行读入文件
-        $record = explode('=', trim(fgets($file)));
+        $raw = trim(fgets($file));
+        if ($raw == '') { continue; } // 跳过空行
+        if (substr($raw, 0, 1) === '#') { continue; } // 跳过注释
+        $record = explode('=', $raw);
         if (count($record) === 2) { // 合法记录
             $data[$record[0]] = $record[1];
         }

redisCache.php

@@ -1,16 +1,18 @@
 <?php
 
 class redisCache {
-    private $redisSetting = array( // redis接口
-        'host' => '127.0.0.1',
-        'port' => 6379,
-        'passwd' => ''
-    );
+    private $redisSetting = array(); // redis接口参数
 
-    public function __construct($prefix) { // 类构建时指定前缀 
-        $this->redisSetting['prefix'] = 'tgbot-' . $prefix . '-';
+    public function __construct($prefix) { // 类初始化
+        global $env;
+        $this->redisSetting = array(
+            'host' => $env['REDIS_HOST'],
+            'port' => $env['REDIS_PORT'],
+            'passwd' => $env['REDIS_PASSWD'],
+            'prefix' => $env['REDIS_PREFIX'] . '-' . $prefix . '-'
+        );
     }
-
+    
     public function getData($key) { // 查询Redis缓存，不存在返回NULL
         $redis = new Redis();
         $redis->connect($this->redisSetting['host'], $this->redisSetting['port']);