Fetch the next row of a result set as an associative, a numeric array, or both

# mysqli_result::fetch_array

# mysqli_fetch_array

(PHP 5, PHP 7, PHP 8)

mysqli_result::fetch_array -- mysqli_fetch_array — Fetch the next row of a result set as an associative, a numeric array, or both

### 说明

面向对象风格

public function mysqli_result::fetch_array(int `$mode` = `MYSQLI_BOTH`): array|null|false

过程化风格

function mysqli_fetch_array(mysqli_result `$result`, int `$mode` = `MYSQLI_BOTH`): array|null|false

Fetches one row of data from the result set and returns it as an array. Each subsequent call to this function will return the next row within the result set, or `null` if there are no more rows.

In addition to storing the data in the numeric indices of the result array, this function can also store the data in associative indices by using the field names of the result set as keys.

If two or more columns of the result have the same name, the last column will take precedence and overwrite any previous data. To access multiple columns with the same name, the numerically indexed version of the row must be used.

> 注意: 此函数返回的字段名大小写敏感。

> 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。
`mode`

  This optional parameter is a constant indicating what type of array should be produced from the current row data. The possible values for this parameter are the constants `MYSQLI_ASSOC`, `MYSQLI_NUM`, or `MYSQLI_BOTH`.

  By using the `MYSQLI_ASSOC` constant this function will behave identically to the mysqli_fetch_assoc(), while `MYSQLI_NUM` will behave identically to the mysqli_fetch_row() function. The final option `MYSQLI_BOTH` will create a single array with the attributes of both.

### 返回值

Returns an 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`.

### 示例

示例 #1 mysqli_result::fetch_array() 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 LIMIT 3";
    $result = $mysqli->query($query);

    /* numeric array */
    $row = $result->fetch_array(MYSQLI_NUM);
    printf("%s (%s)\n", $row[0], $row[1]);

    /* associative array */
    $row = $result->fetch_array(MYSQLI_ASSOC);
    printf("%s (%s)\n", $row["Name"], $row["CountryCode"]);

    /* associative and numeric array */
    $row = $result->fetch_array(MYSQLI_BOTH);
    printf("%s (%s)\n", $row[0], $row["CountryCode"]);

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 LIMIT 3";
    $result = mysqli_query($mysqli, $query);

    /* numeric array */
    $row = mysqli_fetch_array($result, MYSQLI_NUM);
    printf("%s (%s)\n", $row[0], $row[1]);

    /* associative array */
    $row = mysqli_fetch_array($result, MYSQLI_ASSOC);
    printf("%s (%s)\n", $row["Name"], $row["CountryCode"]);

    /* associative and numeric array */
    $row = mysqli_fetch_array($result, MYSQLI_BOTH);
    printf("%s (%s)\n", $row[0], $row["CountryCode"]);

以上示例的输出类似于：

    Kabul (AFG)
    Qandahar (AFG)
    Herat (AFG)

### 参见

- 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_row() - Fetch the next row of a result set as an enumerated array
- mysqli_fetch_object() - Fetch the next row of a result set as an object
- mysqli_query() - 对数据库执行查询
- mysqli_data_seek() - Adjusts the result pointer to an arbitrary row in the result

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