Laravel Blade全局变量 [英] Laravel blade global variable

问题描述

我在laravel中的全局变量有问题.我了解View Composer，但我的问题与该主题无关. 如何在laravel视图(* .blade.php | .php)模板引擎中做这种简单的事情? 例如，这是我的一个观点( .blade.php | * .php)中的示例代码:

I have a problem in global variables in laravel. I know about view composer and my question is not related to that subject. How can I do such a simple thing in laravel view (*.blade.php | .php) template engine? for example this is a sample code from one of my views (.blade.php | *.php):

<?php
   function myFunc() {
     global $myvar;
     if ( ! $myvar ) {
       $myvar = 'my var is empty';
     }
     dd( $myvar );
   }

  $myvar = 'my var value';
  myFunc();

执行结束时，它显示我的变量为空"而不是我的变量值". 有人知道为什么会这样吗?

At the end of the execution it shows up 'my var is empty' and not 'my var value'. Anybody knows why this happens?

推荐答案

最后，我找到了答案，它存在范围问题.因为laravel使用类和方法来检索视图，因此基于此页面信息: http://php.net/manual/zh/language.variables.scope .php#98811

Finally I found my answer, it has scope issue. because laravel uses class and methods to retrieve view so based on this page inforamtion: http://php.net/manual/en/language.variables.scope.php#98811

所以我们可以这样编写代码:

so we can write the code like this:

<?php
   function myFunc() {
     global $myvar;
     if ( ! $myvar ) {
       $myvar = 'my var is empty';
     }
     dd( $myvar );
   }

  global $myvar; // This line is the key
  $myvar = 'my var value';
  myFunc();

这篇关于Laravel Blade全局变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！