PHP mysqli_report() Function: Usage and Examples

Sets MySQLi error reporting and strict exception handling globally for the request.

The examples focus on the operation itself, including the important distinction: PDO::ATTR_ERRMODE configures a PDO connection instead.

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_report(...) — 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_report affects errors globally, and exceptions should be caught around expected recoverable operations.

<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect(getenv('DB_HOST') ?: '127.0.0.1', getenv('DB_USER') ?: 'app', getenv('DB_PASSWORD') ?: '', getenv('DB_NAME') ?: 'demo');
mysqli_set_charset($link, 'utf8mb4');
echo "Strict MySQLi reporting enabled";

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_report affects errors globally, and exceptions should be caught around expected recoverable operations. Error mode changes diagnostic behavior; it does not modify SQL queries.

<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect(getenv('DB_HOST') ?: '127.0.0.1', getenv('DB_USER') ?: 'app', getenv('DB_PASSWORD') ?: '', getenv('DB_NAME') ?: 'demo');
mysqli_set_charset($link, 'utf8mb4');
echo "Exception-based SQL errors configured";

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_report affects errors globally, and exceptions should be caught around expected recoverable operations. Error mode changes diagnostic behavior; it does not modify SQL queries.

<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect(getenv('DB_HOST') ?: '127.0.0.1', getenv('DB_USER') ?: 'app', getenv('DB_PASSWORD') ?: '', getenv('DB_NAME') ?: 'demo');
mysqli_set_charset($link, 'utf8mb4');
echo "MySQLi strict mode ready";

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

MYSQLI_REPORT_ERROR together with MYSQLI_REPORT_STRICT is commonly desired; setting report mode does not execute SQL.

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 MySQLi error reporting and strict exception handling globally for the request.
• MYSQLI_REPORT_ERROR together with MYSQLI_REPORT_STRICT is commonly desired; setting report mode does not execute SQL.
• PDO::ATTR_ERRMODE configures a PDO connection instead.

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