PHP - Manual: mysqli_result::fetch_row

2024-04-29

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mysqli_result::fetch_row

mysqli_fetch_row

(PHP 5, PHP 7, PHP 8)

mysqli_result::fetch_row -- mysqli_fetch_row — Fetch the next row of a result set as an enumerated array

说明

面向对象风格

public mysqli_result::fetch_row(): array|null|false

过程化风格

mysqli_fetch_row(mysqli_result $result): array|null|false

Fetches one row of data from the result set and returns it as an enumerated array, where each column is stored in an array offset starting from 0 (zero). Each subsequent call to this function will return the next row within the result set, or null if there are no more rows.

注意: 此函数将 NULL 字段设置为 PHP null 值。

参数

result: 仅以过程化样式：由 mysqli_query()、mysqli_store_result()、 mysqli_use_result()、mysqli_stmt_get_result() 返回的 mysqli_result 对象。

返回值

Returns an enumerated array representing the fetched row, null if there are no more rows in the result set, 或者在失败时返回 false.

范例

示例 #1 mysqli_result::fetch_row() example

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 ID DESC";

$result = $mysqli->query($query);

/* fetch object array */
while ($row = $result->fetch_row()) {
    printf("%s (%s)\n", $row[0], $row[1]);
}

过程化风格


<?php

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = mysqli_connect("localhost", "my_user", "my_password", "world");

$query = "SELECT Name, CountryCode FROM City ORDER BY ID DESC";

$result = mysqli_query($mysqli, $query);

/* fetch associative array */
while ($row = mysqli_fetch_row($result)) {
    printf("%s (%s)\n", $row[0], $row[1]);
}

以上例程的输出类似于：

Pueblo (USA)
Arvada (USA)
Cape Coral (USA)
Green Bay (USA)
Santa Clara (USA)

参见

mysqli_fetch_array() - Fetch the next row of a result set as an associative, a numeric array, or both
mysqli_fetch_assoc() - Fetch the next row of a result set as an associative array
mysqli_fetch_column() - Fetch a single column from the next row of a result set
mysqli_fetch_object() - Fetch the next row of a result set as an object
mysqli_query() - 对数据库执行一次查询
mysqli_data_seek() - Adjusts the result pointer to an arbitrary row in the result

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User Contributed Notes 4 notes

down

Stephen ¶

15 years ago


It's worth noting that the MySQLi functions (and, I presume, the MySQL functions) fetch a string regardless of the MySQL data type. E.g. if you fetch a row with an integer column, the corresponding value for that column and row will still be stored as a string in the array returned by mysql_fetch_row.

down

sainthyoga2003 at gmail dot com ¶

8 years ago


Note that mysqli_fetch() is deprecated but still is in PHP function list. mysqli_fetch_row() is nowadays mysql procedural style used, but is not listed in PHP functions.

down

evangun2001 at yahoo dot fr ¶

14 years ago


Remember that fetch() and fetch_row() are two different things, and differ in the way to use them.

- fetch() is used on a statement (like an executed prepared statement) and needs to be used in association with bind_result().

- fetch_row() is used on a result (like the result of query()).

As a consequence, if you want to use to use fetch_row() with an executed prepared statement, first you'll have to get the result out of this statement with mysqli_store_result() or mysqli_use_result().

down

maillist at pnpitalia.it ¶

18 years ago


from "README.PHP4-TO-PHP5-THIN-CHANGES"

4. Be careful when porting from ext/mysql to ext/mysqli. The following
   functions return NULL when no more data is available in the result set
   (ext/mysql's functions return FALSE).

    - mysqli_fetch_row()
    - mysqli_fetch_array()
    - mysqli_fetch_assoc()

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官方地址：https://www.php.net/manual/en/mysqli-result.fetch-row.php

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PHP官方手册 - 互联网笔记

mysqli_result::fetch_row

mysqli_fetch_row

说明

参数

返回值

范例

参见

User Contributed Notes 4 notes