使用 Silex 框架在 Twig 模板中使用 Javascript 变量
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Using Javascript variable in Twig template using Silex framework
提问by Moismyname
I am trying to create a route inside of some Javascript inside of a Twig template and need to use a JS variable as a value to a route parameter.
我正在尝试在 Twig 模板内的某些 Javascript 内创建路由，并且需要使用 JS 变量作为路由参数的值。
Example:
例子：
window.location.href = {{ path('post_display', { 'id': this_is_where_i_need_to_use_the_js_var }) }};
I am using the Silex framework and am unsure if FOS JS works for Silex. I don't think it does, though.
我正在使用 Silex 框架，但不确定 FOS JS 是否适用于 Silex。不过，我认为不会。
回答by Maerlyn
Twig, since it's written in PHP, runs on the server, completely separately than the javascript code, so what you want needs a workaround.
Twig，因为它是用 编写的PHP，在服务器上运行，与 javascript 代码完全分开，所以你想要的需要一个解决方法。
First, generate the route, but with a placeholder, then replace that with the value of your variable when neccessary:
首先，生成路线，但使用占位符，然后在必要时将其替换为变量的值：
var route = "{{ path('post_display', { 'id': "PLACEHOLDER" }) }}";
window.location = route.replace("PLACEHOLDER", js_variable);
Something like this should work for you.
像这样的事情应该适合你。
