PHP MySQL没有返回正确的计数

Question

我已使用phpMyAdmin验证了我的查询。计数是130.但是我的代码给了我一个计数。

$query2 = "SELECT COUNT(*) FROM webvulns";
$result2 = mysqli_query($connection, $query2);
confirm_query($result2);
$rowcount=mysqli_num_rows($result2);
echo $rowcount;
// Free result set.
mysqli_free_result($result2);

Answer 1

mysqli_num_rows返回行数。你只有1排。该行中将包含130。获取结果。

$query2 = "SELECT COUNT(*) as da_count FROM webvulns";
$result2 = mysqli_query($connection, $query2);
confirm_query($result2);
$row = mysqli_fetch_assoc($result2);
$rowcount=$row['da_count'];
echo $rowcount;
// Free result set.
mysqli_free_result($result2);

Answer 2

试一试，它会正常工作

  $query2 = "SELECT COUNT(*) FROM webvulns";
    $result2 = mysqli_query($connection, $query2);
    $row = mysqli_fetch_array($result, MYSQLI_NUM);
    echo $row[0];