How can one handle cases where a user does not exist in a database query in PHP?

When handling cases where a user does not exist in a database query in PHP, one approach is to check if the query returned any results before trying to access data. This can be done by using functions like `mysqli_num_rows()` to determine if any rows were returned. If no rows are found, you can handle the case by displaying an appropriate message or taking alternative actions. 

// Assuming $result is the result of a database query
if(mysqli_num_rows($result) > 0) {
    // User exists, fetch data
    $user = mysqli_fetch_assoc($result);
    // Process user data
} else {
    // User does not exist, handle this case
    echo "User not found";
}

Keywords

PHP database query error handling SQL user not found

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