# mysqli_stmt::data_seek

# mysqli_stmt_data_seek

(PHP 5, PHP 7, PHP 8)

mysqli_stmt::data_seek -- mysqli_stmt_data_seek — Adjusts the result pointer to an arbitrary row in the buffered result

### 说明

面向对象风格

public mysqli_stmt::data_seek(int `$offset`): void

过程化风格

mysqli_stmt_data_seek(mysqli_stmt `$statement`, int `$offset`): void

This function moves the result set pointer of the buffered result set to an arbitrary row specified by the `offset` parameter.

This function works only on the buffered internal result set. mysqli_stmt_store_result() must be called prior to mysqli_stmt_data_seek().

### 参数

`statement`

  仅以过程化样式：由 mysqli_stmt_init() 返回的 mysqli_stmt 对象。

`offset`

  Must be between zero and the total number of rows minus one (0.. mysqli_stmt_num_rows() - 1).

### 返回值

没有返回值。

### 示例

示例 #1 面向对象风格

`<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
$stmt = $mysqli->prepare($query);
$stmt->execute();
$stmt->bind_result($name, $code);
$stmt->store_result();
/* seek to row no. 400 */
$stmt->data_seek(399);
$stmt->fetch();
printf("City: %s Countrycode: %s\n", $name, $code);`

示例 #2 过程化风格

`<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
$query = "SELECT Name, CountryCode FROM City ORDER BY Name";
$stmt = mysqli_prepare($link, $query);
mysqli_stmt_execute($stmt);
mysqli_stmt_bind_result($stmt, $name, $code);
mysqli_stmt_store_result($stmt);
/* seek to row no. 400 */
mysqli_stmt_data_seek($stmt, 399);
mysqli_stmt_fetch($stmt);
printf("City: %s Countrycode: %s\n", $name, $code);`

以上示例会输出：

    City: Benin City  Countrycode: NGA

### 参见

- mysqli_prepare() - 预处理执行 SQL
- mysqli_stmt_store_result() - Stores a result set in an internal buffer
- mysqli_stmt_num_rows() - Returns the number of rows fetched from the server
- mysqli_data_seek() - Adjusts the result pointer to an arbitrary row in the result

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