PHP mysqli_info() 函式

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定義和用法

mysqli_info() 函式返回最近一次 MySQLi 函式呼叫執行的查詢的資訊。此函式僅支援以下格式的查詢

• INSERT INTO...SELECT....

• INSERT INTO...VALUES (...),(...),(...).

• LOAD DATA INFILE ....

• ALTER TABLE ....

• UPDATE ....

語法

mysqli_info($con)

引數

返回值

PHP mysqli_info() 函式返回一個字串值，表示最新執行的查詢的描述/資訊。如果最新執行的查詢不是受支援的查詢之一，則此函式返回空字串。

PHP 版本

此函式首次引入於 PHP 5 版本，並在所有後續版本中均有效。

示例

以下示例演示了 mysqli_info() 函式的使用（過程式風格） -

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

   //Query to insert a record into the employee table
   mysqli_query($con, "INSERT INTO employee VALUES ('Sarmista', 'Sharma', 28, 'F', 15000,  101), ('Sheldon', 'Cooper', 25, 'M', 2256,  102)");

   //Query Info
   $error = mysqli_info($con);
   print("Query Info: ".$error);

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

這將產生以下結果 -

Query Info: Records: 2  Duplicates: 0  Warnings: 0

示例

在面向物件風格中，此函式的語法為 $con ->info。以下是此函式在面向物件風格中的示例 -

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

   //Query to retrieve all the rows of employee table
   $con -> query("INSERT INTO employee VALUES ('Sarmista', 'Sharma', 28, 'F', 15000,  101), ('Sheldon', 'Cooper', 25, 'M', 2256,  102)");

   //Query Info
   $info = $con ->info;
   print("Query Info: ".$info);

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

這將產生以下結果 -

Query Info: Records: 2  Duplicates: 0  Warnings: 0

示例

以下是 mysqli_info() 函式的另一個示例 -

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

   //ALTER TABLE Query
   mysqli_query($con, "ALTER TABLE table_name DROP COLUMN CONTACT");
   print("Info: ".mysqli_info($con)."\n");

   //UPDATE Query
   mysqli_query($con, "UPDATE employee set INCOME=INCOME+5000");
   print("Info: ".mysqli_info($con)."\n");

   //INSERT Query
   mysqli_query($con, "INSERT INTO employee (FIRST_NAME, AGE) VALUES (Archana, 25), (Bhuvan, 29)");
   print("Info: ".mysqli_info($con)."\n");

   //INSERT Query using SELECT
   mysqli_query($con, "INSERT into employee(FIRST_NAME, LAST_NAME, AGE) select 'Manoj', 'Tiwari', 45");
   print("Info: ".mysqli_info($con)."\n");

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

這將產生以下結果 -

Info:
Info: Rows matched: 3  Changed: 3  Warnings: 0
Info: Rows matched: 3  Changed: 3  Warnings: 0
Info: Records: 1  Duplicates: 0  Warnings: 0

示例

<?php
   $connection_mysql = mysqli_connect("localhost","root","password","mydb");
   
   if (mysqli_connect_errno($connection_mysql)){
      echo "Failed to connect to MySQL: " . mysqli_connect_error();
   }
   
   $sql1 = "CREATE TABLE NewTable SELECT * FROM(employee)";
   mysqli_query($connection_mysql,$sql1);
   
   echo mysqli_info($connection_mysql);  
   
   mysqli_close($connection_mysql);
?>

這將產生以下結果 -

Records: 7  Duplicates: 0  Warnings: 0