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                            ## **SQL注入**
輸入的字符串中注入 SQL 指令，若程序當中忽略了字符檢查，導致惡意指令被執行而遭到破壞或入侵

#### SQL 注入示例

~~~
$id = $_GET['id'];
$sql = "SELECT * FROM `user` WHERE `id`={$id}";
~~~

將傳遞參數改為

> 1;DROP TABLE OrdersTable--

#### SQL 注入防御

*   使用預編譯語句綁定變量(最佳方式)
*   使用安全的存儲過程(也可能存在注入問題)
*   檢查輸入數據的數據類型(可對抗注入)
*   數據庫最小權限原則
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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