Why Does `mysqli_fetch_array()` Return a Boolean Instead of a Result?

mysqli_fetch_array() Parameter Compatibility Error

Problem:

You are encountering an error stating that mysqli_fetch_array() expects the first parameter to be a mysqli result, but a boolean value is provided.

Answer:

The error occurs because the mysqli_query() function is not returning a valid mysqli result object. You can add the following code after mysqli_query() to determine the cause of the failure:

if (!$check1_res) {
    trigger_error(mysqli_error($con), E_USER_ERROR);
}

This will output the error message that is causing the query to fail.

Possible Causes:

• Incorrect or malformed SQL query
• Database connection issues
• Improper usage of database credentials

Additional Information:

For more detailed information on mysqli error handling, refer to the PHP documentation:

• [mysqli_error()](http://www.php.net/manual/en/mysqli.error.php)

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