mysqli_result::data_seek
mysqli_result::data_seek
mysqli_data_seek
(PHP 5, PHP 7)
mysqli_result :: data_seek -- mysqli_data_seek — 将结果指针调整为结果中的任意行
描述
面向对象的风格
bool mysqli_result::data_seek ( int $offset )
程序风格
bool mysqli_data_seek ( mysqli_result $result , int $offset )
所述mysqli_data_seek（）函数试图通过offset指定一个任意结果指针的结果集。
参数
`result`
仅过程风格：由mysqli_query（），mysqli_store_result（）或mysqli_use_result（）返回的结果集标识符。
offset
字段偏移量。必须介于零与总行数减1之间（0..mysqli_num_rows（） - 1）。
返回值
成功返回TRUE或失败时返回FALSE。
笔记
注意：
例子
Example＃1面向对象的风格
<?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(
?>
示例＃2程序风格
<?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
?>
上面的例子会输出：
City: Benin City Countrycode: NGA
