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                # PHP mysqli_insert_id() 函數 ## 實例 假設 Persons 表有一個自動生成的 ID 字段。返回最后一次查詢中的 ID: ``` <?php $con=mysqli_connect("localhost","my_user","my_password","my_db"); // Check connection if (mysqli_connect_errno($con)) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); } mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age) VALUES ('Glenn','Quagmire',33)"); // Print auto-generated id echo "New record has id: " . mysqli_insert_id($con); mysqli_close($con); ?> ``` ## 定義和用法 mysqli_insert_id() 函數返回最后一個查詢中自動生成的 ID(通過 AUTO_INCREMENT 生成)。 ## 語法 mysqli_insert_id(_connection_)_;_ | 參數 | 描述 | | --- | --- | | _connection_ | 必需。規定要使用的 MySQL 連接。 | ## 技術細節 | 返回值: | 返回一個在最后一個查詢中自動生成的帶有 AUTO_INCREMENT 字段值的整數。如果數字 &gt; 最大整數值,它將返回一個字符串。如果沒有更新或沒有 AUTO_INCREMENT 字段,將返回 0。 | | :-- | --- | | PHP 版本: | 5+ | | :-- | --- |
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