MySQL Tutorials - Herong's Tutorial Examples
∟PHP Programs and MySQL Server
∟mysqli_connect() and Other MySQL Functions
Describes functions supported by the MySQL extension library, php_mysql.dll. mysql_connect() creates a connection to the specified MySQL server.
PHP's MySQL support comes from an extension library, php_mysqli.dll, which
offers a number of functions:
- mysqli_connect() - Connects to a MySQL server, and returns a connection resource.
In most cases, you need to call it with 3 arguments like mysql_connect($server, $username, $password).
$server specifies the network address of machine where the MySQL server is running.
$username specifies the user login name on the MySQL server.
$password specifies the password for the login name.
- mysqli_close() - Closes a MySQL connection resource. Usually, you call it with 1 parameter
like mysqli_close($connection), where $connection represents the connection resource to be closed.
- mysqli_get_server_info() - Returns a string of server information.
- mysqli_status() - Returns a string of server status.
- mysqli_query() - Sends a query to the server, and returns a result set resource.
For example, mysql_query('SELECT * FROM MyTable WHERE ID = 10').
- mysqli_affected_rows() - Returns the number of effected rows of the given result set,
if the executed query is an INSERT or UPDATE statement.
- mysqli_num_rows() - Returns the number of rows of the given result set, if the
executed query is a SELECT statement.
- mysqli_fetch_array() - Fetches a row from a given result set, and returns the row
as an array with both numeric index, and column name map. It will return boolean false,
if there is no row left in the result set.
- mysqli_free_result() - Frees the given result set.
Table of Contents
About This Book
Introduction of SQL
MySQL Introduction and Installation
Introduction of MySQL Programs
►PHP Programs and MySQL Server
Configuring PHP for MySQL Server Access
MySQL Authentication Method "caching_sha2_password"
►mysqli_connect() and Other MySQL Functions
MySqlLoop.php - MySQL Functions Test
Perl Programs and MySQL Servers
Java Programs and MySQL Servers
Datatypes and Data Literals
Operations and Expressions
Character Strings and Bit Strings
Commonly Used Functions
Table Column Types for Different Types of Values
Using DDL to Create Tables and Indexes
Using DML to Insert, Update and Delete Records
Using SELECT to Query Database
Window Functions for Statistical Analysis
Use Index for Better Performance
Transaction Management and Isolation Levels
Locks Used in MySQL
Defining and Calling Stored Procedures
Variables, Loops and Cursors Used in Stored Procedures
System, User-Defined and Stored Procedure Variables
MySQL Server Administration
Storage Engines in MySQL Server
InnoDB Storage Engine - Primary and Secondary Indexes
Performance Tuning and Optimization
Bulk Changes on Large Tables
MySQL Server on macOS
Installing MySQL Server on Linux
Connection, Performance and Second Instance on Linux
Archived Tutorials
References
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