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.
}
?>
mysqli_result::data_seek
mysqli_data_seek
(PHP 5, PHP 7)
mysqli_result::data_seek -- mysqli_data_seek — Adjusts the result pointer to an arbitrary row in the result
설명
객체 기반 형식
bool mysqli_result::data_seek
( int
$offset
)절차식 형식
The mysqli_data_seek() function seeks to an arbitrary
result pointer specified by the offset in the
result set.
인수
-
result -
순차 형식 전용: mysqli_query()나 mysqli_store_result()나 mysqli_use_result()가 반환한 결과셋 식별자.
-
offset -
The field offset. Must be between zero and the total number of rows minus one (0..mysqli_num_rows() - 1).
반환값
성공 시 TRUE를, 실패 시 FALSE를 반환합니다.
주의
Note:
This function can only be used with buffered results attained from the use of the mysqli_store_result() or mysqli_query() functions.
예제
Example #1 객체 기반 형식
<?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();
?>
Example #2 절차식 형식
<?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);
?>
위 예제들의 출력:
City: Benin City Countrycode: NGA
참고
- mysqli_store_result() - Transfers a result set from the last query
- mysqli_fetch_row() - Get a result row as an enumerated array
- mysqli_fetch_array() - Fetch a result row as an associative, a numeric array, or both
- mysqli_fetch_assoc() - Fetch a result row as an associative array
- mysqli_fetch_object() - Returns the current row of a result set as an object
- mysqli_query() - Performs a query on the database
- mysqli_num_rows() - Gets the number of rows in a result
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User Contributed Notes 1 note
kaisellgren at gmail dot com ¶
15 years ago
