Data_seek

In this article, we will focus on the mysqli_data_seek() function in PHP, which is used to move the result pointer to a specified row number in a result set. We will provide you with an overview of the function, how it works, and examples of its use.

Introduction to the mysqli_data_seek() function

The mysqli_data_seek() function is a built-in function in PHP that is used to move the result pointer to a specified row number in a result set. This function is useful when you need to access a specific row in a result set, rather than iterating over the entire result set.

How to use the mysqli_data_seek() function

Using the mysqli_data_seek() function is straightforward. You just need to call the function on a valid result object and pass in the row number you want to move the result pointer to. Here is an example:

<?php
$mysqli = mysqli_connect("localhost", "username", "password", "database");

$query = "SELECT * FROM my_table";
$result = mysqli_query($mysqli, $query);

if (!$result) {
    echo "Failed to execute query: " . mysqli_error($mysqli);
    exit();
}

// move result pointer to row 3
mysqli_data_seek($result, 2);

// fetch the data from row 3
$row = mysqli_fetch_assoc($result);

print_r($row);

mysqli_close($mysqli);
?>

In this example, we first connect to a MySQL database using the mysqli_connect() function. We then execute a query using the mysqli_query() function and store the result in a variable. We check if there was an error in the query using the mysqli_error() function. If there was an error, we output the error message and exit the script.

Next, we use the mysqli_data_seek() function to move the result pointer to the third row in the result set. Finally, we use the mysqli_fetch_assoc() function to fetch the data from the third row and store it in a variable. We output the variable using the print_r() function.

Conclusion

In conclusion, the mysqli_data_seek() function is a useful tool for accessing specific rows in a result set in PHP. By understanding how to use the function and its advanced usage scenarios, you can take advantage of this feature to create powerful and flexible MySQLi queries in your PHP scripts.