Why Does My MySQLi Code Throw a \'Fatal error: Call to undefined function mysqli_result()\' Error?

Fatal Error in Migrating from MySQL to MySQLi: Call to Undefined Function mysqli_result()

When attempting to update an old SQL query using MySQLi, developers may encounter a "Fatal error: Call to undefined function mysqli_result()" error. This occurs when using the mysqli_result() function, which is not available in MySQLi.

To resolve this error, it is crucial to recognize that mysqli_result() is an obsolete function that should not be employed for modern database operations. Instead, the recommended alternative is to utilize mysqli_fetch_assoc(), which provides a more efficient single operation.

The updated code should resemble the following:

$query = "SELECT * FROM `product_category`";
$result = mysqli_query($connect, $query) or die("could not perform query");
$num_rows = mysqli_num_rows($result);

for ($i=0; $i < $num_rows; $i++)
{
    $row = mysqli_fetch_assoc($result);
    $ID = $row['ID'];
    $name = $row['name'];
    $description = $row['description'];
}

By adhering to this approach, developers can avoid the undefined function error and establish an efficient communication with their database using MySQLi.

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