(PHP 4, PHP 5)
mysql_data_seek — �ƶ��ڲ������ָ��
$result
, int $row_number
) : boolmysql_data_seek() ��ָ���Ľ����ʶ�������� MySQL ����ڲ�����ָ���ƶ���ָ�����кš����ŵ��� mysql_fetch_row() ��������һ�С�
row_number �� 0 ��ʼ��row_number
��ȡֵ��ΧӦ�ô� 0 �� mysql_num_rows - 1��������������Ϊ�գ�mysql_num_rows()
== 0����Ҫ��ָ���ƶ��� 0 ��ʧ�ܲ����� E_WARNING
���Ĵ���mysql_data_seek() ������ FALSE��
�ɹ�ʱ���� TRUE�� ������ʧ��ʱ���� FALSE��
Example #1 mysql_data_seek() ����
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db('sample_db');
if (!$db_selected) {
die('Could not select database: ' . mysql_error());
}
$query = 'SELECT last_name, first_name FROM friends';
$result = mysql_query($query);
if (!$result) {
die('Query failed: ' . mysql_error());
}
/* fetch rows in reverse order */
for ($i = mysql_num_rows($result) - 1; $i >= 0; $i--) {
if (!mysql_data_seek($result, $i)) {
echo "Cannot seek to row $i: " . mysql_error() . "\n";
continue;
}
if (!($row = mysql_fetch_assoc($result))) {
continue;
}
echo $row['last_name'] . ' ' . $row['first_name'] . "<br />\n";
}
mysql_free_result($result);
?>
Note:
����չ�� PHP 5.5.0 ���ѷ����������� PHP 7.0.0 ��ʼ���Ƴ���Ӧʹ�� MySQLi �� PDO_MySQL ��չ���滻֮���μ� MySQL��ѡ�� API ָ���Լ���� FAQ ����ȡ������Ϣ������������������У�
- mysqli_data_seek()
PDO::FETCH_ORI_ABS
Note:
mysql_data_seek() ֻ�ܺ� mysql_query() �������ʹ�ã����������� mysql_unbuffered_query()��