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The role of mysqli_query function in php
Definition and usage
## The #mysqli_query() function executes a query against the database. Syntaxmysqli_query(connection,query,resultmode);Parameters connection required. Specifies the MySQL connection to use. query Required, specifies the query string. resultmode Optional. a constant. Can be any of the following values: MYSQLI_USE_RESULT (use this if you need to retrieve large amounts of data) MYSQLI_STORE_RESULT (default) Return value: For a successful SELECT , SHOW, DESCRIBE or EXPLAIN query will return a mysqli_result object. For other successful queries, TRUE will be returned. On failure, returns FALSE. PHP Version: 5 Update log: The asynchronous query function is added in PHP 5.3.0.
Execute a query against the database:
Delete the database
<?php // 假定数据库用户名:root,密码:123456,数据库:RUNOOB $con=mysqli_connect("localhost","root","123456","RUNOOB"); if (mysqli_connect_errno($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); ?>Recommended tutorial:
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