mysqli::stmt_init

定義和用法

stmt_init() / mysqli_stmt_init()函數初始化語句並返回適合mysqli_stmt_prepare()使用的對象。

實例

例子1 - 面向對像風格

初始化一個語句並返回一個用於stmt_prepare()的對象：

 <?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 ( ) ;
}

$city = "Sandnes" ;

// 創建一個預處理語句
$stmt = $mysqli -> stmt_init ( ) ;

if ( $stmt -> prepare ( "SELECT District FROM City WHERE Name=?" ) ) {
  // 綁定參數
  $stmt -> bind_param ( "s" , $city ) ;

  // 執行查詢
  $stmt -> execute ( ) ;

  // 綁定結果變量
  $stmt -> bind_result ( $district ) ;

  // 獲取值
  $stmt -> fetch ( ) ;

  printf ( "%s is in district %s" , $city , $district ) ;

  // 關閉語句
  $stmt -> close ( ) ;
}

$mysqli -> close ( ) ;
?>

例子2 - 過程式風格

初始化一個語句並返回一個用於mysqli_stmt_prepare() 的對象：

 <?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 ;
}

$city = "Sandnes" ;

// 創建一個預處理語句
$stmt = mysqli_stmt_init ( $con ) ;

if ( mysqli_stmt_prepare ( $stmt , "SELECT District FROM City WHERE Name=?" ) ) {
  // 綁定參數
  mysqli_stmt_bind_param ( $stmt , "s" , $city ) ;

  // 執行查詢
  mysqli_stmt_execute ( $stmt ) ;

  // 綁定結果變量
  mysqli_stmt_bind_result ( $stmt , $district ) ;

  // 獲取值
  mysqli_stmt_fetch ( $stmt ) ;

  printf ( "%s is in district %s" , $city , $district ) ;

  // 關閉語句
  mysqli_stmt_close ( $stmt ) ;
}

mysqli_close ( $con ) ;
?>