mysqli_info()函數(shù)返回最近執(zhí)行的 SQL 語句的信息
mysqli_info()函數(shù)返回有關(guān)最近MySQLi函數(shù)調(diào)用執(zhí)行的查詢的信息。此函數(shù)支持僅以下格式的查詢：
INSERT INTO...SELECT....
INSERT INTO...VALUES (...),(...),(...).
LOAD DATA INFILE ....
ALTER TABLE ....
UPDATE ....
mysqli_info($con)
| 序號 | 參數(shù)及說明 |
|---|---|
| 1 | con(必需) 這是一個表示與MySQL Server的連接的對象。 |
PHP mysqli_info()函數(shù)返回一個字符串值，該字符串值表示最近執(zhí)行的查詢的描述/信息。如果執(zhí)行的最新查詢不是受支持的查詢，則此函數(shù)返回一個空字符串。
此函數(shù)最初是在PHP版本5中引入的，并且可以在所有更高版本中使用。
以下示例演示了mysqli_info()函數(shù)的用法（面向過程風(fēng)格）-
<?php
//建立連接
$con = mysqli_connect("localhost", "root", "password", "mydb");
//查詢并將記錄插入到employee表中
mysqli_query($con, "INSERT INTO employee VALUES ('Sarmista', 'Sharma', 28, 'F', 15000, 101), ('Sheldon', 'Cooper', 25, 'M', 2256, 102)");
//查詢信息
$error = mysqli_info($con);
print("查詢信息: ".$error);
//關(guān)閉連接
mysqli_close($con);
?>輸出結(jié)果
查詢信息: Records: 2 Duplicates: 0 Warnings: 0
在面向?qū)ο蟮臉邮街?，此函?shù)的語法為$ con-> info。以下是面向?qū)ο髽邮降拇撕瘮?shù)的示例-
<?php
//建立連接
$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)");
//查詢信息
$info = $con ->info;
print("查詢信息: ".$info);
//關(guān)閉連接
$con -> close();
?>輸出結(jié)果
查詢信息: Records: 2 Duplicates: 0 Warnings: 0
以下是mysqli_info()函數(shù)的另一個示例-
<?php
//建立連接
$con = mysqli_connect("localhost", "root", "password", "mydb");
//ALTER TABLE 查詢
mysqli_query($con, "ALTER TABLE table_name DROP COLUMN CONTACT");
print("Info: ".mysqli_info($con)."\n");
//UPDATE 查詢
mysqli_query($con, "UPDATE employee set INCOME=INCOME+5000");
print("Info: ".mysqli_info($con)."\n");
//INSERT 查詢
mysqli_query($con, "INSERT INTO employee (FIRST_NAME, AGE) VALUES (Archana, 25), (Bhuvan, 29)");
print("Info: ".mysqli_info($con)."\n");
//INSERT 插入使用 SELECT語句
mysqli_query($con, "INSERT into employee(FIRST_NAME, LAST_NAME, AGE) select 'Manoj', 'Tiwari', 45");
print("Info: ".mysqli_info($con)."\n");
//關(guān)閉連接
mysqli_close($con);
?>輸出結(jié)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
返回最近執(zhí)行查詢的信息：
<?php
$connection_mysql = mysqli_connect("localhost","root","password","mydb");
if (mysqli_connect_errno($connection_mysql)){
echo "連接MySql失敗: " . mysqli_connect_error();
}
$sql1 = "CREATE TABLE NewTable SELECT * FROM(employee)";
mysqli_query($connection_mysql,$sql1);
echo mysqli_info($connection_mysql);
mysqli_close($connection_mysql);
?>輸出結(jié)果
Records: 7 Duplicates: 0 Warnings: 0