(PHP 5, PHP 7, PHP 8)
mysqli_result::data_seek -- mysqli_data_seek — Adjusts the result pointer to an arbitrary row in the result
Object-oriented style
Procedural style
The mysqli_data_seek() function seeks to an arbitrary result pointer specified by the offset in the result set.
resultProcedural style only: A mysqli_result object returned by mysqli_query(), mysqli_store_result(), mysqli_use_result() or mysqli_stmt_get_result().
offsetThe row offset. Must be between zero and the total number of rows minus one (0..mysqli_num_rows() - 1).
Example #1 mysqli::data_seek() example
Object-oriented style
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
$result = $mysqli->query($query);
$result->data_seek(400);
$row = $result->fetch_row();
printf("City: %s Countrycode: %s\n", $row[0], $row[1]);Procedural style
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
$result = mysqli_query($link, $query);
mysqli_data_seek($result, 400);
$row = mysqli_fetch_row($result);
printf ("City: %s Countrycode: %s\n", $row[0], $row[1]);The above examples will output:
City: Benin City Countrycode: NGA
Example #2 Adjusting the result pointer when iterating
This function can be useful when iterating over the result set to impose a custom order or rewind the result set when iterating multiple times.
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
$query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 15,4";
$result = $mysqli->query($query);
for ($row_no = $result->num_rows - 1; $row_no >= 0; $row_no--) {
$result->data_seek($row_no);
$row = $result->fetch_row();
printf("City: %s Countrycode: %s\n", $row[0], $row[1]);
}
$result->data_seek(0);
print "\n";
while ($row = $result->fetch_row()) {
printf("City: %s Countrycode: %s\n", $row[0], $row[1]);
}The above examples will output:
City: Acmbaro Countrycode: MEX City: Abuja Countrycode: NGA City: Abu Dhabi Countrycode: ARE City: Abottabad Countrycode: PAK City: Abottabad Countrycode: PAK City: Abu Dhabi Countrycode: ARE City: Abuja Countrycode: NGA City: Acmbaro Countrycode: MEX
Note:
This function can only be used with buffered results attained from the use of the mysqli_store_result(), mysqli_query() or mysqli_stmt_get_result() functions.