mysqli_stmt::data_seek
(PHP 5, PHP 7)
mysqli_stmt :: data_seek - mysqli_stmt_data_seek - 在语句结果集中搜索任意行
描述
面向对象的风格
void mysqli_stmt::data_seek ( int $offset )程序风格
void mysqli_stmt_data_seek ( mysqli_stmt $stmt , int $offset )在语句结果集中搜索任意结果指针。
mysqli_stmt_store_result（）必须在mysqli_stmt_data_seek（）之前调用。
参数
`stmt` 仅过程风格：由mysqli_stmt_init（）返回的语句标识符。
offset
必须介于零与总行数减一（0 .. mysqli_stmt_num_rows（） - 1）之间。
返回值
没有值返回。
例子
Example #1 Object oriented style
<?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();
}
$query?=?"SELECT?Name,?CountryCode?FROM?City?ORDER?BY?Name";
if?($stmt?=?$mysqli->prepare($query))?{
????/*?execute?query?*/
????$stmt->execute();
????/*?bind?result?variables?*/
????$stmt->bind_result($name,?$code);
????/*?store?result?*/
????$stmt->store_result();
????/*?seek?to?row?no.?400?*/
????$stmt->data_seek(399);
????/*?fetch?values?*/
????$stmt->fetch();
????printf?("City:?%s??Countrycode:?%s\n",?$name,?$code);
????/*?close?statement?*/
????$stmt->close();
}
/*?close?connection?*/
$mysqli->close();
?>Example #2 Procedural style
<?php
/*?Open?a?connection?*/
$link?=?mysqli_connect("localhost",?"my_user",?"my_password",?"world");
/*?check?connection?*/
if?(mysqli_connect_errno())?{
????printf("Connect?failed:?%s\n",?mysqli_connect_error());
????exit();
}
$query?=?"SELECT?Name,?CountryCode?FROM?City?ORDER?BY?Name";
if?($stmt?=?mysqli_prepare($link,?$query))?{
????/*?execute?query?*/
????mysqli_stmt_execute($stmt);
????/*?bind?result?variables?*/
????mysqli_stmt_bind_result($stmt,?$name,?$code);
????/*?store?result?*/
????mysqli_stmt_store_result($stmt);
????/*?seek?to?row?no.?400?*/
????mysqli_stmt_data_seek($stmt,?399);
????/*?fetch?values?*/
????mysqli_stmt_fetch($stmt);
????printf?("City:?%s??Countrycode:?%s\n",?$name,?$code);
????/*?close?statement?*/
????mysqli_stmt_close($stmt);
}
/*?close?connection?*/
mysqli_close($link);
?>上面的例子会输出：
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