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                # PHP mysqli_query() 函數 ## 實例 執行針對數據庫的查詢: ``` <?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(); } // Perform queries mysqli_query($con,"SELECT * FROM Persons"); mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age) VALUES ('Glenn','Quagmire',33)"); mysqli_close($con); ?> ``` ## 定義和用法 mysqli_query() 函數執行某個針對數據庫的查詢。 ## 語法 mysqli_query(_connection,query,resultmode_)_;_ | 參數 | 描述 | | --- | --- | | _connection_ | 必需。規定要使用的 MySQL 連接。 | | _query_ | 必需,規定查詢字符串。 | | _resultmode_ |可選。一個常量。可以是下列值中的任意一個: `MYSQLI_USE_RESULT`(如果需要檢索大量數據,請使用這個) `MYSQLI_STORE_RESULT`(默認) | ## 技術細節 | 返回值: | 針對成功的 SELECT、SHOW、DESCRIBE 或 EXPLAIN 查詢,將返回一個 mysqli_result 對象。針對其他成功的查詢,將返回 TRUE。如果失敗,則返回 FALSE。 | | :-- | --- | | PHP 版本: | 5+ | | :-- | --- | | 更新日志: | 在 PHP 5.3.0 中新增了異步查詢的功能。 | | :-- | --- |
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