When encountering errors like "mysqli_error() expects parameter 1 to be mysqli," what steps can be taken to troubleshoot and identify the root cause of the issue?

When encountering the error "mysqli_error() expects parameter 1 to be mysqli," it typically means that the function is not receiving a valid mysqli connection object as its parameter. To troubleshoot and fix this issue, ensure that you have established a valid mysqli connection before calling mysqli_error(). 

// Establish a mysqli connection
$connection = new mysqli("localhost", "username", "password", "database");

// Check if the connection was successful
if ($connection->connect_error) {
    die("Connection failed: " . $connection->connect_error);
}

// Perform database operations using the $connection object
$query = "SELECT * FROM table";
$result = $connection->query($query);

// Check for errors
if (!$result) {
    echo "Error: " . mysqli_error($connection);
}

// Close the connection
$connection->close();

Keywords

mysqli_error parameter mysqli troubleshoot root cause

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