MySqli can't connect to localhost

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I have this line of code:

$mysqli = new mysqli("localhost", "user", "pass", "db");

I'm using XAMPP for the Apache and MySQL. If I use the line above it throws the following error:

Warning: mysqli::mysqli(): (HY000/1045): Access denied for user 'user'@'localhost' (using password: YES) in C:\xampp\htdocs\xo\php\connect.php on line 2
Failed to connect to MySQL: (1045) Access denied for user 'user'@'localhost' (using password: YES)
Warning: main(): Couldn't fetch mysqli in C:\xampp\htdocs\xo\php\connect.php on line 6

It's the same if I replace localhost with 127.0.0.1(I tried). But if I use my internal network IP(in this case 192.168.1.101) instead of localhost it connects successfully.


Try it this:

$mysqli = new mysqli("localhost", "user", "pass", "db", 3306);
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mysqli::real_escape_string - Manual, This function is used to create a legal SQL string that you can use in an SQL Executing this function without a valid MySQLi connection passed in will return  Intelligence that Learns App Patterns & Adapts to Maximize Data Protection.


you're having problems with your params

$mysqli = new mysqli($localhost, $user, $pass, $db);

$localhost, $user, $pass, $db (these params should be consistent)

Cannot connect to database with MySQLi but can with MySQL , The mysqli version of mysql_connect() is mysqli_connect() . If you look over here you can see that mysqli_connect() is an alias of the  MySQL for OEM/ISV. Over 2000 ISVs, OEMs, and VARs rely on MySQL as their products' embedded database to make their applications, hardware and appliances more competitive, bring them to market faster, and lower their cost of goods sold.


I got the error:

Warning: mysqli_connect(): (HY000/1045): Access denied for user 'dinesh'@'localhost' (using password: YES) in C:\xampp..............

I replaced localhost with my IP address and it finally worked in Windows 10.

PHP MySQL Connect to database, PHP 5 and later can work with a MySQL database using: MySQLi PDO will work on 12 different database systems, whereas MySQLi will only work with MySQL  For those using with replication enabled on their servers, add a mysqli_select_db() statement before any data modification queries. MySQL replication does not handle statements with db.table the same and will not replicate to the slaves if a scheme is not selected before.


After upgrade from php5 to php7, the same problem stuck me for 2 days and finally I found out it is because at php.ini setup, you also need to define the socket location for mysqli. The original mysql got deprecate after php5.5 so after the upgrade, need to add mysqli.default_socket besides mysql.default_socket for its socket location.

Just need to make sure the following lines is at php.ini :

mysqli.default_socket = /path to/mysql.sock mysql.default_socket = /path to/mysql.sock

MySQLi, The PDO MySQL driver extension, for example, does not expose an API to the PHP developer, but provides an interface to the PDO layer above it. MySQLi is an​  You can establish MySQLi database using mysql binary at command prompt. Here is a simple example to connect to MySQL server to establish mysqli database from command prompt − This will give you mysql> command prompt where you will be able to execute any SQL command. Following is the result of above command − Welcome to the MySQL monitor.


I think it should be:

$mysqli = new mysqli($localhost, $user, $pass, $db);

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Learning PHP, MySQL & JavaScript: With JQuery, CSS & HTML5, How do you connect to a MySQL database using mysqli? 2. How do you submit a query to MySQL using mysqli? 3. How can you retrieve a string containing an  To automate the process of converting the script from MySQL to MySQLi, I can use the following online tools. I will create a sample insertion and retrieval code and convert it using one of these


How to Connect PHP to MySQL Database with PDO and MySQLi, This article will show you the easiest ways to do it, let's begin. Creating a MySQL Database (  The query() / mysqli_query() function performs a query against a database. Can be one of the following: MYSQLI_USE_RESULT (Use this to retrieve large amount of data)


Beginning MySQL Database Design and Optimization: From Novice to , There are two modes for returning a result set: you can employ either storage mode or usage mode. Using storage mode—that is, mysqli_real_query() and  On Ubuntu, when mysqli is missing, execute the following, sudo apt-get install php7.x-mysqli sudo service apache2 restart Replace 7.x with your PHP version.. Note: This could be 7.0 and up, but for example Drupal recommends PHP 7.2 on grounds of security among others.