PHP mysqli_stmt_data_seek()用法及代碼示例

定義和用法

該函數接受一個語句對象和一個整數值作為參數，並在給定語句的結果集中尋找指定的行(如果有)。確保在調用此函數之前已存儲結果集(使用 mysqli_stmt_data_seek())。

用法

mysqli_stmt_data_seek($stmt);

參數

Sr.No	參數及說明
1	stmt(Mandatory) 這是一個表示準備好的語句的對象。
2	offset(Mandatory) 這是一個表示所需行的整數值(必須介於 0 和結果集中的總行數之間)。

返回值

PHP mysqli_stmt_data_seek() 函數返回不返回任何值。

PHP版本

這個函數最初是在 PHP 版本 5 中引入的，適用於所有後續版本。

示例

以下示例演示了 mysqli_stmt_data_seek() 函數的用法(程序風格) -

<?php
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   mysqli_query($con, "CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
   print("Table Created.....\n");
   mysqli_query($con, "INSERT INTO myplayers values(1, 'Sikhar', 'Dhawan', 'Delhi', 'India')");
   mysqli_query($con, "INSERT INTO myplayers values(2, 'Jonathan', 'Trott', 'CapeTown', 'SouthAfrica')");
   mysqli_query($con, "INSERT INTO myplayers values(3, 'Kumara', 'Sangakkara', 'Matale', 'Srilanka')");
   print("Record Inserted.....\n");

   //Retrieving the contents of the table
   $stmt = mysqli_prepare($con, "SELECT * FROM myplayers");

   //Executing the statement
   mysqli_stmt_execute($stmt);

   //Binding values in result to variables
   mysqli_stmt_bind_result($stmt, $id, $fname, $lname, $pob, $country);

   //Storing the result
   mysqli_stmt_store_result($stmt);

   //Moving the seek
   mysqli_stmt_data_seek($stmt, 2);
   mysqli_stmt_fetch($stmt);
   print("Id:".$id."\n");
   print("fname:".$fname."\n");
   print("lname:".$lname."\n");
   print("pob:".$pob."\n");
   print("country:".$country."\n");
   print("\n");

   //Closing the statement
   mysqli_stmt_close($stmt);

   //Closing the connection
   mysqli_close($con);
?>

這將產生以下結果 -

Table Created.....
Record Inserted.....
Id:3
fname:Kumara
lname:Sangakkara
pob:Matale
country:Srilanka

示例

在麵向對象風格中，這個函數的語法是 $stmt->data_seek();以下是麵向對象樣式 $minus 中此函數的示例；

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   $con -> query("CREATE TABLE Test(Name VARCHAR(255), AGE INT)");
   $con -> query("insert into Test values('Raju', 25),('Rahman', 30),('Sarmista', 27)");
   print("Table Created.....\n");
   $stmt = $con -> prepare( "SELECT * FROM Test");

   //Executing the statement
   $stmt->execute();

   //Binding variables to resultset
   $stmt->bind_result($name, $age);

   $stmt->store_result();

   //Moving the seek
   $stmt->data_seek(2);

   $stmt->fetch();
   print("Name:".$name."\n");
   print("Age:".$age."\n");

   //Closing the statement
   $stmt->close();

   //Closing the connection
   $con->close();
?>

這將產生以下結果 -

Table Created.....
Name:Sarmista
Age:27