我收到错误的PHP。未定义的索引

Question

foreach($formattedDatas as $key => $formattedData) {    
        foreach ($formattedData as $keyFormat => $valueFormat) {        
                $brandDataArray['sales_price']  += $valueFormat['total_price'];
        }           
}

我收到了这个通知：

A PHP Error was encountered
Severity: Notice
Message: Undefined index: sales_price
Filename: models/sales_aggregated.php
Line Number: 34

有人可以帮我解决这个问题吗？

Answer 1

在尝试添加$brandDataArray['sales_price']之前对其进行初始化。

// Assuming the array $brandDataArray already exists. 
// If not, initialize that too!
$brandDataArray['sales_price'] = 0;

// Then proceed...
foreach($formattedDatas as $key => $formattedData) {    
    foreach ($formattedData as $keyFormat => $valueFormat) {        
        $brandDataArray['sales_price']  += $valueFormat['total_price'];
    }           
}