mysql_data_seek
(PHP3 , PHP4)
mysql_data_seek --- 移動內部指標
語法 :
int mysql_data_seek(int result_identifier, int row_number)說明 :
成功則傳回true，失敗則傳回false。
mysql_data_seek( )移動MySQL內部的列指標到指定列的數目，之後以呼叫mysql_fetch_row( )將會傳回此列。
row_number起始值為0。
Example :
<?php
$link = mysql_pconnect ("kron", "jutta", "geheim") or die ("Could not connect");
mysql_select_db ("samp_db") or die ("Could not select database");
$query = "SELECT last_name, first_name FROM friends";
$result = mysql_query ($query) or die ("Query failed");
# fetch rows in reverse order
for ($i = mysql_num_rows ($result) - 1; $i >=0; $i--) {
if (!mysql_data_seek ($result, $i)) {
printf ("Cannot seek to row %d\n", $i); continue;
}
if(!($row = mysql_fetch_object ($result)))
continue;
printf ("%s %s<BR>\n", $row->last_name, $row->first_name);
}
mysql_free_result ($result);
?>