What are some common reasons for getting the error message "Call to a member function bind_param() on a non-object" in PHP scripts?

The error message "Call to a member function bind_param() on a non-object" typically occurs when trying to call the bind_param() method on a variable that is not an object, usually due to a failed database query. To solve this issue, you should check if the query was successful before attempting to bind parameters. 

// Check if the query was successful before binding parameters
if ($stmt = $mysqli->prepare("SELECT * FROM table WHERE id = ?")) {
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $stmt->bind_result($result);
    $stmt->fetch();
    $stmt->close();
} else {
    echo "Error in query preparation.";
}

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