PHP mysqli_real_connect() Function: Usage and Examples

Opens a connection using a mysqli object initialized with mysqli_init.

The examples focus on the operation itself, including the important distinction: mysqli_connect combines initialization and connection in one function.

What It Does

Use the examples below to observe the behavior on a small dataset before extending it to application code.

Syntax and Return Value

mysqli_real_connect(...) — requires the corresponding optional extension

The displayed signature describes the API or identifies any correction or optional dependency. When a parameter is optional, supply it only when the task requires it.

Example 1: Basic Use

mysqli_real_connect works on an initialized mysqli object; call options before connecting.

<?php
$link = mysqli_init();
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 3);
mysqli_real_connect($link, getenv("DB_HOST") ?: "127.0.0.1", getenv("DB_USER") ?: "app", getenv("DB_PASSWORD") ?: "", getenv("DB_NAME") ?: "demo");
mysqli_set_charset($link, "utf8mb4");
echo "Connected";

This example is meant for a configured application environment; output depends on the installed extension, external service, or database contents.

Example 2: Checking Behavior

mysqli_real_connect works on an initialized mysqli object; call options before connecting. Connection timeout is an option chosen before real_connect.

<?php
$link = mysqli_init();
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 5);
mysqli_real_connect($link, getenv("DB_HOST") ?: "127.0.0.1", getenv("DB_USER") ?: "app", getenv("DB_PASSWORD") ?: "", getenv("DB_NAME") ?: "demo");
mysqli_set_charset($link, "utf8mb4");
echo "Connected";

This example is meant for a configured application environment; output depends on the installed extension, external service, or database contents.

Example 3: Practical Example

mysqli_real_connect works on an initialized mysqli object; call options before connecting. Connection timeout is an option chosen before real_connect.

<?php
$link = mysqli_init();
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 7);
mysqli_real_connect($link, getenv("DB_HOST") ?: "127.0.0.1", getenv("DB_USER") ?: "app", getenv("DB_PASSWORD") ?: "", getenv("DB_NAME") ?: "demo");
mysqli_set_charset($link, "utf8mb4");
echo "Connected";

This example is meant for a configured application environment; output depends on the installed extension, external service, or database contents.

Important Behavior and Edge Cases

Connection options must be set before the real_connect call.

This API is supplied by an optional extension that is not installed in the local test runtime, or requires a different PHP version. The example must be verified in a matching environment.

Comparison with Related Approaches

Common Beginner Mistakes

Key Takeaways

• Opens a connection using a mysqli object initialized with mysqli_init.
• Connection options must be set before the real_connect call.
• mysqli_connect combines initialization and connection in one function.

Use mysqli_real_connect when its documented behavior matches the problem. Test the relevant edge cases in your own runtime before deploying it.