Warning: count(): Parameter must be an array or an object that implements Countable快速解决方法

Warning: count(): Parameter must be an array or an object that implements Countable。
解决thinkphp3项目在开发时弹出一个警告Warning: count(): Parameter must be an array or an object that implements Countable。
这说明count()参数必须是一个数组或一个对象，和前面warning: a non-numeric value encountered in line错误类似，都是php7版本引起的。版本更新后，部分方法会变得更加严谨，传递一个无效参数的时候，count()函数抛出warning的警告

From this it seems that the count() parameter must be an array or an object, just set it as an array and try, the original error code line:
count( $discoun{t}_{l}IST),modifiedas:COUn-T((AR\; \&\; ltR\; \&\; ltAY)$ discount_list)
Save and clearing cache error disappears.
In this way, it seems that this problem can be adjusted according to the error message. I hope this article can bring you a little help.