Php mysqli_fetch_assoc错误

错误

$link = mysqli_connect('localhost', 'root', '', 'mutli_page_form');

$result = mysqli_query($link, "SELECT * FROM wills_children WHERE id=77");
$row = mysqli_fetch_assoc($result);

$data = unserialize($row['children']);

有什么问题吗

它试图提取的序列化数据

Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, boolean given in

试试这个：

a:1:{i:0;a:3:{i:0;s:15:\"Natural Chlid 1\";i:1;s:15:\"Natural Chlid 2\";i:2;s:15:\"Natural Chlid 3\";}} 

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

    /* fetch associative array */
    if($row = mysqli_fetch_assoc($result)) {
        $data = unserialize($row['children']);
    }

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