Why Does mysqli_connect() Fail with 'No Such File or Directory' Error?

Addressing "Warning: mysqli_connect(): (HY000/2002): No Such File or Directory" Issue

When attempting to connect to a MySQL database using the mysqli_connect() function, it's crucial to ensure that the provided arguments are valid. In the given scenario, the database connection is failing with the "No such file or directory" error.

To address this issue, focus on the following:

1. Use MySQL Host IP Instead of 'localhost': Instead of specifying the host as "localhost," use the IPv4 address, which is "127.0.0.1." Contrary to popular belief, "localhost" and "127.0.0.1" are not always interchangeable when connecting to MySQL databases.
2. Verify Host, Username, Password, and Database Existence: Ensure that the username, password, and hostname you're attempting to connect with are valid. Double-check that the database you're trying to access actually exists.
3. Ensure PHP MySQL Extension Enabled: Verify that the PHP MySQL extension is enabled in your PHP installation. This extension is required to use the mysqli_connect() function.

Here's an updated code snippet incorporating the changes:

$con = mysqli_connect("127.0.0.1", "vanilla_user3", "vanilla_password", "vanilla");
if (mysqli_connect_errno($con)) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

By incorporating these adjustments, you should be able to successfully connect to your MySQL database and resolve the "No such file or directory" error.

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