修复一些小问题

public/test.php

@@ -1,3 +1,14 @@
 <?php
-
-echo '测试用例';
+function encrypt($string, $key) {
+    $method = "AES-256-CBC";
+    $iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($method));
+    $encrypted = openssl_encrypt($string, $method, $key, 0, $iv);
+    // 将iv和加密字符串拼接起来
+    return base64_encode($iv . $encrypted);
+}
+ 
+$key = "your-encryption-key"; // 这里应该是一个安全的密钥
+$string = "Hello, World!";
+$encryptedString = encrypt($string, $key);
+ 
+echo $encryptedString; // 输出加密字符串