Question

我有以下代码：

<?
include"mysql.php";
$getusers= mysqli_query ("select count(*) as cnt from users",$c);
$totalusers= mysqli_fetch_array ($getusers);
$totalusers=$totalusers['cnt'];
$getusers= mysqli_query ("select * from users",$c);
$totalmoney=0;
while($usr= mysqli_fetch_array ($getusers))
{
$totalmoney=$totalmoney+$usr['total_earned'];
}
$getoffers= mysqli_query ("select count(*) as cnt from offers where         active=1",$c);
$ocnt= mysqli_fetch_array ($getoffers);
$ocnt=$ocnt['cnt'];

print"<p>Total Offers: $ocnt<br>Total Members: $totalusers<br>Total Earned:   \$$totalmoney</p>";

?>

它仍然给我这个错误：

警告：mysqli_query（）要求参数1为mysqli，第48行/home/u705139137/public_html/header.php中给出的字符串

警告：mysqli_fetch_array（）要求参数1为mysqli_result，在第49行的/home/u705139137/public_html/header.php中给出null

警告：mysqli_query（）期望参数1为mysqli，第51行/home/u705139137/public_html/header.php中给出的字符串

警告：mysqli_fetch_array（）要求参数1为mysqli_result，在第53行的/home/u705139137/public_html/header.php中给出null

警告：mysqli_query（）要求参数1为mysqli，第57行/home/u705139137/public_html/header.php中给出的字符串

警告：mysqli_fetch_array（）要求参数1为mysqli_result，在第58行的/home/u705139137/public_html/header.php中给出null

我做错了什么？

Answer 1

更改你的mysqli_query，如下所示

 <?
    include"mysql.php";
    $getusers= mysqli_query ($c,"select count(*) as cnt from users");
    $totalusers= mysqli_fetch_array ($getusers);
    $totalusers=$totalusers['cnt'];
    $getusers= mysqli_query ("select * from users",$c);
    $totalmoney=0;
    while($usr= mysqli_fetch_array ($getusers))
    {
    $totalmoney=$totalmoney+$usr['total_earned'];
    }
    $getoffers= mysqli_query ("select count(*) as cnt from offers where         active=1",$c);
    $ocnt= mysqli_fetch_array ($getoffers);
    $ocnt=$ocnt['cnt'];

    print"<p>Total Offers: $ocnt<br>Total Members: $totalusers<br>Total Earned:   \$$totalmoney</p>";

    ?>

看; http://www.w3schools.com/php/func_mysqli_query.asp

Answer 2

这样做

$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
$getusers= mysqli_query ($mysqli, "select count(*) as cnt from users");

http://php.net/manual/en/mysqli.query.php

mysqli_query期望参数1为mysqli

2 个答案: