mysqli - $ stmt-> num_rows返回0

Question

我想使用mysqli/prepared语句计算下面的查询返回的记录数:

$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();

输出一致为0

Answer 1

您正在使用mysql_stmt_num_rowsOOP样式,因此将其称为函数是不正确的.尝试:

$stmt->num_rows;

代替:

$stmt->num_rows();

基本上,你正试图获得这个值:

class mysqli_stmt { 

   int num_rows

}

也,

$stmt->store_result;

应该:

$stmt->store_result();