PHP mysqli_stmt_data_seek()用法及代码示例

定义和用法

该函数接受一个语句对象和一个整数值作为参数，并在给定语句的结果集中寻找指定的行(如果有)。确保在调用此函数之前已存储结果集(使用 mysqli_stmt_data_seek())。

用法

mysqli_stmt_data_seek($stmt);

参数

Sr.No	参数及说明
1	stmt(Mandatory) 这是一个表示准备好的语句的对象。
2	offset(Mandatory) 这是一个表示所需行的整数值(必须介于 0 和结果集中的总行数之间)。

返回值

PHP mysqli_stmt_data_seek() 函数返回不返回任何值。

PHP版本

这个函数最初是在 PHP 版本 5 中引入的，适用于所有后续版本。

示例

以下示例演示了 mysqli_stmt_data_seek() 函数的用法(程序风格) -

<?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);
?>

这将产生以下结果 -

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

示例

在面向对象风格中，这个函数的语法是 $stmt->data_seek();以下是面向对象样式 $minus 中此函数的示例；

<?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();
?>

这将产生以下结果 -

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