PHP mysqli_options() Function: Usage and Examples

Sets a MySQLi connection option before mysqli_real_connect.

The examples focus on the operation itself, including the important distinction: mysqli_report changes error mode and is separate from per-connection options.

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_options(...) — 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

Connection options take effect only when set before the actual connection.

<?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");
echo "Connection established with a timeout";

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

Example 2: Checking Behavior

Connection options take effect only when set before the actual connection. Change options before establishing the connection; timeout is in seconds.

<?php
$link = mysqli_init();
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 2);
mysqli_real_connect($link, getenv("DB_HOST") ?: "127.0.0.1", getenv("DB_USER") ?: "app", getenv("DB_PASSWORD") ?: "", getenv("DB_NAME") ?: "demo");
echo "Connection established with a timeout";

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

Example 3: Practical Example

Connection options take effect only when set before the actual connection. Change options before establishing the connection; timeout is in seconds.

<?php
$link = mysqli_init();
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 8);
mysqli_real_connect($link, getenv("DB_HOST") ?: "127.0.0.1", getenv("DB_USER") ?: "app", getenv("DB_PASSWORD") ?: "", getenv("DB_NAME") ?: "demo");
echo "Connection established with a timeout";

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

Not all options are mutable after connecting; choose constants supported by your client library.

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

• Sets a MySQLi connection option before mysqli_real_connect.
• Not all options are mutable after connecting; choose constants supported by your client library.
• mysqli_report changes error mode and is separate from per-connection options.

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