PHP mysqli_multi_query() 函数

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定义和用法

mysqli_multi_query() 函数接受一个表示查询的字符串值作为参数之一，并在数据库上执行/执行给定的查询。

您还可以通过分号分隔它们来将多个查询传递给此函数。

您可以使用 mysqli_use_result() 和 mysqli_more_results() 或 ysqli_store_result() 和 mysqli_next_result() 函数从该函数检索结果集（对于 SELECT、SHOW、DESCRIBE 和 EXPLAIN 查询）。

语法

mysqli_multi_query($con, query)

参数

返回值

如果第一个函数失败，mysqli_multi_query() 函数将返回 false。

PHP 版本

此函数首次在 PHP 5 版本中引入，并在所有后续版本中都能工作。

示例

以下示例演示了mysqli_multi_query() 函数（过程式风格）的用法：

<?php
   //Creating a connection
   $con = mysqli_connect("localhost", "root", "password", "mydb");
   $query = "CREATE TABLE Test(Name VARCHAR(255), AGE INT); insert into Test values('Raju', 25),('Rahman', 30),('Sarmista', 27)";
   mysqli_multi_query($con, $query);
   print("Data added......");
   //Closing the connection
   mysqli_close($con);
?>

这将产生以下结果：

Data added......

如果您观察数据库中表的內容，您可以看到如下所示的插入记录：

mysql> select * from players;
+------------+-----------+-------------+
| First_Name | Last_Name | Country     |
+------------+-----------+-------------+
| Shikhar    | Dhawan    | India       |
| Jonathan   | Trott     | SouthAfrica |
+------------+-----------+-------------+
2 rows in set (0.00 sec)

示例

在面向对象风格中，此函数的语法是$con->multi_query();以下是此函数在面向对象风格中的示例：

<?php
   $con = new mysqli("localhost", "root", "password", "mydb");
   $query = "CREATE TABLE Test(Name VARCHAR(255), AGE INT); insert into Test values('Raju', 25),('Rahman', 30),('Sarmista', 27)";
   //Inserting a records into the players table
   $con->multi_query($query);
   print("Data Created......");
   //Closing the connection
   $res = $con -> close();
?>

这将产生以下结果：

Data added......

示例

以下示例创建一个表，并通过使用mysqli_multi_query()函数逐一执行查询来填充它：

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

   mysqli_multi_query($con, "CREATE TABLE IF NOT EXISTS my_team(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
   print("Table Created ..."."\n");

   //Inserting a records into the my_team table
   mysqli_multi_query($con, "insert into my_team values(1, 'Shikhar', 'Dhawan', 'Delhi', 'India')");
   mysqli_multi_query($con, "insert into my_team values(2, 'Jonathan', 'Trott', 'CapeTown', 'SouthAfrica')");
   mysqli_multi_query($con, "insert into my_team values(3, 'Kumara', 'Sangakkara', 'Matale', 'Srilanka')");
   mysqli_multi_query($con, "insert into my_team values(4, 'Virat', 'Kohli', 'Delhi', 'India')");

   print("Records Inserted ..."."\n");

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

这将产生以下结果：

Table Created ...
Records Inserted ...

示例

假设我们在数据库中创建了一个名为 players 的表并对其进行了填充，如下所示：

CREATE TABLE Players (Name VARCHAR(255), Age INT, Score INT);
insert into Players values('Dhavan', 33, 90),('Rohit', 28, 26),('Kohli', 25, 50);

以下示例从mysqli_multi_query函数检索结果集：

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

   //Executing the multi query
   $query = "SELECT * FROM players;CREATE TABLE Test (Name VARCHAR(255), Age INT);insert into Test values('Raju', 25),('Rahman', 30),('Ramani', 22);SELECT * FROM Test";

   $res = mysqli_multi_query($con, $query);

   if ($res) {
      do {
         if ($result = mysqli_use_result($con)) {
            while ($row = mysqli_fetch_row($result)) {
               print("Name: ".$row[0]."\n");
               print("Age: ".$row[1]."\n");
            }
            mysqli_free_result($result);
         }
         if (mysqli_more_results($con)) {
            print("\n");
         }
      } while (mysqli_next_result($con));
   }
   mysqli_close($con);
?>

这将产生以下结果：

Name: Dhavan
Age: 33
Name: Rohit
Age: 28
Name: Kohli
Age: 25

Name: Raju
Age: 25
Name: Rahman
Age: 30
Name: Ramani
Age: 22