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PHP mysqli_query () function

PHP MySQLi Reference Manual PHP MySQLi Reference Manual

Performed for database queries:

<?php 
// 假定数据库用户名:root,密码:123456,数据库:w3big 
$con=mysqli_connect("localhost","root","123456","w3big"); 
if (mysqli_connect_errno($con)) 
{ 
    echo "连接 MySQL 失败: " . mysqli_connect_error(); 
} 

// 执行查询
mysqli_query($con,"SELECT * FROM websites");
mysqli_query($con,"INSERT INTO websites (name, url, alexa, country)
VALUES ('百度','https://www.baidu.com/','4','CN')");

mysqli_close($con);
?>

Definition and Usage

mysqli_query () function to execute a query against the database.


grammar

mysqli_query( connection,query,resultmode ) ;

参数 描述
connection 必需。规定要使用的 MySQL 连接。
query 必需,规定查询字符串。
resultmode

可选。一个常量。可以是下列值中的任意一个:

  • MYSQLI_USE_RESULT(如果需要检索大量数据,请使用这个)
  • MYSQLI_STORE_RESULT(默认)

technical details

return value: For successful SELECT, SHOW, DESCRIBE or EXPLAIN query will return a mysqli_result object. For other successful query will return TRUE. If it fails, it returns FALSE.
PHP version: 5+
Update log: Added asynchronous query functions in PHP 5.3.0 in.


PHP MySQLi Reference Manual PHP MySQLi Reference Manual