Question

我希望使用mysqli / prepared语句计算下面查询返回的记录数：

$mysql = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('There was a problem connecting to the database');
$stmt = $mysql->prepare('SELECT id,vcref,jobtitle,jobtype,jobintro,closingdate FROM jobs WHERE active = 1');
$stmt->execute();
$stmt->store_result;
$stmt->bind_result($id,$vcref,$jobtitle,$jobtype,$jobintro,$closingdate);
$stmt->fetch();
$totalLiveJobs = $stmt->num_rows();

输出始终为0

Answer 1

您在OOP样式中使用mysql_stmt_num_rows，因此将其作为函数调用是不正确的。尝试：

$stmt->num_rows;

而不是：

$stmt->num_rows();

基本上，你正试图获得这个值：

class mysqli_stmt { 

   int num_rows

}

另外，

$stmt->store_result;

应该是：

$stmt->store_result();

mysqli - $ stmt-＆gt; num_rows返回0

1 个答案: