mysqli_result::fetch_row

mysqli_fetch_row

(PHP 5)

mysqli_result::fetch_row -- mysqli_fetch_row — Get a result row as an enumerated array

说明

面向对象风格

mixed mysqli_result::fetch_row ( void )

过程化风格

mixed mysqli_fetch_row ( mysqli_result $result )

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.

参数

result: 仅以过程化样式：由 mysqli_query()， mysqli_store_result() 或 mysqli_use_result()返回的结果集标识。

返回值

mysqli_fetch_row() returns an array of strings that corresponds to the fetched row or NULL if there are no more rows in result set.

Note: 此函数将 NULL 字段设置为 PHP NULL 值。

范例

Example #1 面向对象风格


<?php
$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 ID DESC LIMIT 50,5";

if ($result = $mysqli->query($query)) {

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

    /* free result set */
    $result->close();
}

/* close connection */
$mysqli->close();
?>

Example #2 过程化风格


<?php
$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 ID DESC LIMIT 50,5";

if ($result = mysqli_query($link, $query)) {

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

    /* free result set */
    mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>

以上例程会输出：

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

参见

mysqli_fetch_array() - Fetch a result row as an associative, a numeric array, or both
mysqli_fetch_assoc() - Fetch a result row as an associative array
mysqli_fetch_object() - Returns the current 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

用户评论:

evangun2001 at yahoo dot fr (2007-09-16 14:24:20)

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().

Stephen (2007-01-23 02:29:55)

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.

maillist at pnpitalia.it (2004-01-06 10:01:54)

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()