获取laravel中的选择列表的值

Question

I created a blade with the following dropdown

  <?php
                 $Years = App\InvoiceHeader::pluck('year')
                                           ->all() ;
               ?>
               {{ Form::select('Year', $Years, null) }}

I want to use the selected year in another PHP tag in the same blade. How can I get the selected value

Answer 1

PHP only runs on server side, this means that you can't manipulate it after the content of the page are sent to the client (browser). So you can't get the value of the input and use for another thing with PHP without send the data to the server and reload the page with the new information. But it isn't a good thing to do and provides a poor user experience.

For manipulate the page on the browser without need to reload we have JavaScript.

In your case you need to add an onchange event on select:

{{ Form::select('Year', $Years, null, ['onchange' => 'yearChanged(event)']) }}

Then you create the Javascript function:

<script>
    function yearChanged(e) {
        //Do anything you want
    }
</script>

To get the value of the select inside this function you can use e.target.value