PHP中闭包内的未定义变量

Question

我在使用Laravel，PHP和Blade时遇到问题

@for ($i=1; $i <= 12; $i++)
{!!           
    ($substance->consumptions->filter(function($consumption, $key){
        return $consumption->date->month == $i;
    })->sum('quantity'))
!!},
@endfor

未定义变量：i（查看：/Users/luisalcaras/Projects/piba_web/resources/views/index.blade.php）

Answer 1

您必须使用conv1 = conv2d(data, filters, kernel_size=[2, 2], padding='same', activation=tf.nn.relu) 关键字将变量从父作用域传递到闭包：

'use'

希望这有帮助

Answer 2

试试这个吗？

@for ($i=1; $i <= 12; $i++)
{!!           
    ($substance->consumptions->filter(function($consumption, $key){
        global $i;
        return $consumption->date->month == $i;
    })->sum('quantity'))
!!},
@endfor