php - 如何从mysql对php循环中的项目求和

Question

<?php
    $query2 = QModel::query("SELECT * FROM transaction");
    while($get2 = QModel::g($query2)) {
        $totalprice = $get2['price'];
        echo array_sum($totalprice);
    }
?>

我得到 php 错误：

消息：array_sum() 期望参数 1 是数组，给定字符串

请帮忙谢谢

Answer 1

你可以这样使用：

$totalprice += $get1['price'];

Answer 2

while($get2==Qmodel::query("select * from transaction"))
{
    $totalprice[]=$get2['price'];
}
echo array_sum($totalprice);

Answer 3

while(..)
{
    $totalpirce += $get2['price'];
}

Answer 4

干得好：

<?php
$query2 = QModel::query('SELECT FROM transaction');
while($get2 = QModel::q($query2)){
  $sum += $get2['price'];
}
echo $sum;
?>

Answer 5

为什么不使用SELECT transaction.*, SUM(price) as total_price FROM transaction？

Answer 6

$totalprice=$get2['price];=>定义数组的方法不正确 $totalprice[]=$get2['price];=>定义数组的正确方法

$totalprice=array();
$query="";
while(condition){
      $totalprice[]=$get2['price];
}echo array_sum($totalprice);