mysqli-$ stmt-> num_rows返回0 [英] mysqli - $stmt->num_rows returning 0

问题描述

我希望通过mysqli/prepared语句计算以下查询返回的记录数:

i am looking to count the number of records returned by the query below using mysqli / prepared statements:

$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

推荐答案

您正在以OOP风格使用mysql_stmt_num_rows，因此将其作为函数调用是不正确的.试试:

You're using mysql_stmt_num_rows in the OOP style, so calling it as a function is incorrect. Try:

$stmt->num_rows;

代替:

$stmt->num_rows();

基本上，您正在尝试获取此值:

Basically, you're trying to get this value:

class mysqli_stmt { 

   int num_rows

}

也是

$stmt->store_result;

应该是:

$stmt->store_result();

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