mysqli::$insert_id

定義和用法

mysqli_insert_id()函數返回上次查詢生成的id（使用AUTO_INCREMENT 生成）。

實例

例子1 - 面向對像風格

假設"Persons" 表有一個自動生成的id 字段。返回上次查詢的id：

 <?php
$mysqli = new mysqli ( "localhost" , "my_user" , "my_password" , "my_db" ) ;

if ( $mysqli -> connect_errno ) {
  echo "Failed to connect to MySQL: " . $mysqli -> connect_error ;
  exit ( ) ;
}

$mysqli -> query ( "INSERT INTO Persons (FirstName, LastName, Age) VALUES ('Glenn', 'Quagmire', 33)" ) ;

// 打印自動生成的id
echo "New record has id: " . $mysqli -> insert_id ;

$mysqli -> close ( ) ;
?>

例子2 - 過程式風格

假設"Persons" 表有一個自動生成的id 字段。返回上次查詢的id：

 <?php
$con = mysqli_connect ( "localhost" , "my_user" , "my_password" , "my_db" ) ;

if ( mysqli_connect_errno ( ) ) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error ( ) ;
  exit ( ) ;
}

mysqli_query ( $con , "INSERT INTO Persons (FirstName, LastName, Age) VALUES ('Glenn', 'Quagmire', 33)" ) ;

// 打印自動生成的id
echo "New record has id: " . mysqli_insert_id ( $con ) ;

mysqli_close ( $con ) ;
?>