Why is My mysqli Data Insertion Failing Despite Debugging?

Inserting Data with mysqli

In PHP, you can insert data into a MySQL database using the mysqli extension. However, you may encounter issues where the data insertion is unsuccessful despite passing the necessary debugging steps.

A common mistake is binding variables multiple times using bind_param(). To resolve this, bind all variables together, specifying the data types followed by the variables. This ensures that the correct values are associated with the query parameters.

For example, consider this corrected code:

$stmt2->bind_param('ss', $username, $password);

Here, we specify the data types (ss) and bind both variables ($username and $password) in one step.

Alternatively, in PHP 5.6 or later, you can use the spread operator (...) to bind variables from an array:

$data = ['user' => 'someUser', 'password' => 'secret'];
$stmt2->bind_param('ss', ...$data);

By following these corrections, you ensure that the data insertion statement is executed successfully and inserts a row into the table.

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