laravel刀片文件中检查变量为null [英] checking variable is null in laravel blade file

问题描述

我有变量 $ material_details-> pricing = null 我要检查变量是否在laravel刀片文件中设置.我尝试过

I have the variable $material_details->pricing=null I want to check the variable is set in laravel blade file.I have tried as

@isset($material_details->pricing)
 <tr>
   <td>price is not null</td>
 </tr>
@endisset

但是没有运气.如何检查laravel 5.3刀片文件中是否设置了变量.

but no luck .How to check the variable is set or not in laravel 5.3 blade file.

推荐答案

您可以使用

空合并运算符: {{$ material_details ??第二个值"}}

或elvis运算符: {{$ material_details?:'默认值'}} (检查给定值是否为空或空)

or elvis operator: {{ $material_details ?: 'default value' }} (checks given value is empty or null)

阅读Elvis和Null合并运算符.

Read on Elvis and Null coalescing operator.

链接:

猫王: https://en.wikipedia.org/wiki/Elvis_operator

空合并运算符: https://en.wikipedia.org/wiki/Null_coalescing_operator

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