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(PHP 5)
mysqli_result::data_seek -- mysqli_data_seek — Adjusts the result pointer to an arbitary row in the result
Objektorientierter Stil
Prozeduraler Stil
The mysqli_data_seek() function seeks to an arbitrary result pointer specified by the offset in the result set.
Nur bei prozeduralem Aufruf: Ein von mysqli_query(), mysqli_store_result() oder mysqli_use_result() zurückgegebenes Ergebnisobjekt.
The field offset. Must be between zero and the total number of rows minus one (0..mysqli_num_rows() - 1).
Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.
Hinweis:
This function can only be used with buffered results attained from the use of the mysqli_store_result() or mysqli_query() functions.
Objektorientierter Stil
<?php
/* Open a connection */
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
if ($result = $mysqli->query( $query)) {
/* seek to row no. 400 */
$result->data_seek(399);
/* fetch row */
$row = $result->fetch_row();
printf ("City: %s Countrycode: %s\n", $row[0], $row[1]);
/* free result set*/
$result->close();
}
/* close connection */
$mysqli->close();
?>
Prozeduraler Stil
<?php
/* Open a connection */
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (!$link) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
if ($result = mysqli_query($link, $query)) {
/* seek to row no. 400 */
mysqli_data_seek($result, 399);
/* fetch row */
$row = mysqli_fetch_row($result);
printf ("City: %s Countrycode: %s\n", $row[0], $row[1]);
/* free result set*/
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
The above examples will output:
City: Benin City Countrycode: NGA
This is useful function when you try to loop through the resultset numerous times.
For example:
<?php
$result = mysqli_query($connection_id,$query);
while ($row = mysqli_fetch_assoc($result))
{
// Looping through the resultset.
}
// Now if you need to loop through it again, you would first call the seek function:
mysqli_data_seek($result,0);
while ($row = mysqli_fetch_assoc($result))
{
// Looping through the resultset again.
}
?>
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