diff --git a/z.ai/ip-replace/ip-replace.php b/z.ai/ip-replace/ip-replace.php
new file mode 100644
index 0000000..c2f826c
--- /dev/null
+++ b/z.ai/ip-replace/ip-replace.php
@@ -0,0 +1,181 @@
+<?php
+// 设置默认时区（可选，防止警告）
+date_default_timezone_set('Asia/Shanghai');
+
+// 处理表单提交
+ $result_content = '';
+ $original_content = '';
+
+if ($_SERVER["REQUEST_METHOD"] == "POST") {
+    $target_ip = trim($_POST['target_ip'] ?? '');
+    $original_content = trim($_POST['content'] ?? '');
+
+    if (!empty($original_content) && !empty($target_ip)) {
+        // 1. 构建正则表达式 (匹配 #IPv4# 或 #[IPv6]#)
+        // 为了在替换时区分 IPv4 和 IPv6，我们在正则中使用了两个捕获组：
+        // Group 1: IPv4 地址
+        // Group 2: IPv6 地址 (包含括号)
+        $pattern = '/#((?:\d{1,3}\.){3}\d{1,3})|((\[[0-9a-fA-F:]+\]))#/';
+
+        // 2. 判断目标 IP 是 IPv4 还是 IPv6，以决定替换时是否加括号
+        $is_ipv6_target = (strpos($target_ip, ':') !== false);
+        
+        // 准备替换后的格式
+        $replacement_format = '#%s#';
+        $final_ip = $target_ip;
+
+        // 如果目标包含冒号，视为 IPv6，自动加上方括号以兼容原有格式
+        if ($is_ipv6_target) {
+            $final_ip = "[$target_ip]";
+        }
+
+        // 3. 执行替换
+        // 使用回调函数处理，以确保完美兼容原有的括号风格
+        $result_content = preg_replace_callback($pattern, function ($matches) use ($final_ip) {
+            return '#' . $final_ip . '#';
+        }, $original_content);
+    }
+} else {
+    // 默认演示文本
+    $original_content = "nonencrypt/55838#1.1.1.1#55838
+nonencrypt/26153#[2403:2c80::1]#26153
+server/test#192.168.0.5#8080
+link/db#[::1]#3306";
+    $result_content = $original_content; // 默认结果显示原样
+}
+?>
+
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>IP 批量替换工具 (兼容 IPv4/IPv6)</title>
+    <style>
+        body {
+            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+            background-color: #f4f6f9;
+            color: #333;
+            margin: 0;
+            padding: 20px;
+            display: flex;
+            justify-content: center;
+        }
+        .container {
+            background-color: #fff;
+            width: 100%;
+            max-width: 900px;
+            padding: 30px;
+            border-radius: 8px;
+            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
+        }
+        h1 {
+            text-align: center;
+            color: #2c3e50;
+            margin-bottom: 30px;
+        }
+        .form-group {
+            margin-bottom: 20px;
+        }
+        label {
+            display: block;
+            margin-bottom: 8px;
+            font-weight: bold;
+            color: #555;
+        }
+        input[type="text"] {
+            width: 100%;
+            padding: 12px;
+            border: 1px solid #ddd;
+            border-radius: 4px;
+            font-size: 16px;
+            box-sizing: border-box;
+        }
+        .btn-submit {
+            background-color: #007bff;
+            color: white;
+            border: none;
+            padding: 12px 24px;
+            font-size: 16px;
+            border-radius: 4px;
+            cursor: pointer;
+            width: 100%;
+            transition: background-color 0.3s;
+        }
+        .btn-submit:hover {
+            background-color: #0056b3;
+        }
+        .grid-layout {
+            display: grid;
+            grid-template-columns: 1fr 1fr;
+            gap: 20px;
+            margin-top: 20px;
+        }
+        @media (max-width: 768px) {
+            .grid-layout {
+                grid-template-columns: 1fr;
+            }
+        }
+        textarea {
+            width: 100%;
+            height: 300px;
+            padding: 10px;
+            border: 1px solid #ddd;
+            border-radius: 4px;
+            font-family: monospace;
+            resize: vertical;
+            box-sizing: border-box;
+            background-color: #fafafa;
+        }
+        .box-title {
+            font-size: 14px;
+            color: #777;
+            margin-bottom: 5px;
+            display: flex;
+            justify-content: space-between;
+        }
+        .tag {
+            background: #e9ecef;
+            padding: 2px 6px;
+            border-radius: 3px;
+            font-size: 12px;
+        }
+    </style>
+</head>
+<body>
+
+<div class="container">
+    <h1>IP 批量替换工具</h1>
+
+    <form method="post" action="">
+        <div class="form-group">
+            <label for="target_ip">替换为的新 IP (Fixed IP)</label>
+            <input type="text" id="target_ip" name="target_ip" placeholder="例如: 192.168.1.1 或 2001:db8::1" required>
+        </div>
+
+        <div class="grid-layout">
+            <div>
+                <div class="box-title">
+                    <span>原始内容</span>
+                    <span class="tag">Input</span>
+                </div>
+                <textarea name="content" placeholder="在此粘贴包含 #IP# 的文本..."><?php echo htmlspecialchars($original_content); ?></textarea>
+            </div>
+            
+            <div>
+                <div class="box-title">
+                    <span>替换结果</span>
+                    <span class="tag">Output</span>
+                </div>
+                <textarea readonly onclick="this.select()"><?php echo htmlspecialchars($result_content); ?></textarea>
+            </div>
+        </div>
+
+        <div style="margin-top: 20px;">
+            <button type="submit" class="btn-submit">执行替换</button>
+        </div>
+    </form>
+</div>
+
+</body>
+</html>
\ No newline at end of file
