php 选择第一个选项为空的框
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Select box with first option empty
提问by JaviZu
Does anybody know how can I set in my select box the first option to empty value?
有谁知道如何在我的选择框中将第一个选项设置为空值？
I'm getting the data from my DB, and I would like to set the option by default as "Please select one option".
我正在从我的数据库获取数据，并且我想将该选项默认设置为“请选择一个选项”。
回答by darkbluesun
I found that 'default'=>'Please select'doesn't work with the HTML5 required attribute.
This does work:
我发现这'default'=>'Please select'不适用于 HTML5 required 属性。这确实有效：
$listOfValues = [1 => 'Choice 1'];
Form::select('fieldname',[null=>'Please Select'] + $listOfValues);
If you don't like modern PHP syntax,
如果你不喜欢现代 PHP 语法，
$listOfValues = array(1 => 'Choice 1');
$listOfValues[null] = 'Please Select';
Form::select('fieldname', $listOfValues);
But the point is to have a label for the null value.
但关键是要有一个空值的标签。
回答by endroo
If you are using the HTML package by LaravelCollective, you do the following..
如果您使用LaravelCollective的HTML 包，请执行以下操作。
Form::select('size', array('L' => 'Large', 'S' => 'Small'), null, ['placeholder' => 'Pick a size...']);
回答by Maurice
There are 2 methods to do this:
有两种方法可以做到这一点：
{{ Form::select('user', array('default' => 'Please select one option') + $users, 'default') }}
Or
或者
<select>
<option selected disabled>Please select one option</option>
@foreach($users as $user)
<option value="{{ $user->id }}">{{ $user->name }}</option>
@endforeach
</select>
回答by Laerte
For anyone that needs this behavior, this way is working fine:
对于任何需要这种行为的人来说，这种方式工作正常：
Controller:
控制器：
$entityArray = Entity::lists('name', 'id');
$entityArray->prepend('Select', 'Select');
View:
看法：
{!! Form::select('entity', $entityArray) !!}
回答by GRIFFIN KISIA
This worked for me on Laravel 5.4.
这在 Laravel 5.4 上对我有用。
{{ Form::select('agency', $agency, null, [
'placeholder' => 'Please select ...',
'class' => 'form-control'
]) }}
回答by md asif rahman
in controller
在控制器中
$data['options']=Entity::pluck('name','id')->prepend('Please Select','');
return view('your_view_blade',$data);
in view blade
在视图刀片
{!! Form::select('control_name',$options,null,['class'=>'your_class']) !!}
回答by Matthew Skaman DonDobias
100% result:
100% 结果：
In controller:
在控制器中：
$users = App\User::get()->lists('full_name', 'id')->prepend('Select user','');
return view('name of view')->with('users', $users);
In view:
鉴于：
{!! Form::select('who', $users, null, ['class' => 'form-control inline']) !!}
I′m using "laravelcollective/html":"^5.3.0" package
我正在使用 "laravelcollective/html":"^5.3.0" 包
回答by StevenW
For a Laravel 5 collection, you may need to convert the collection to array first.
对于 Laravel 5 集合，您可能需要先将集合转换为数组。
<?php
$defaultSelection = [''=>'Please Select'];
$users = $defaultSelection + $users->toArray();?>
and apply $users as
并将 $users 应用为
{!! Form::select('user', $users); !!}
回答by sanu
In Laravel 5.1 i solved it by doing
在 Laravel 5.1 中我解决了它
$categories = [''=>''] + Category::lists('name', 'id')->toArray();
return view('products.create', compact('categories'));
Or
或者
$categories = [''=>''] + Category::lists('name', 'id')->all();
return view('products.create', compact('categories'));
回答by Yousef Altaf
In laravel 5.2
在 Laravel 5.2
This worked for me
这对我有用
{!! Form::select('user', $users, null, array('class'=>'form-control', 'placeholder' => 'Please select')) !!}
as I just add placeholderand it made the trick
正如我刚刚添加的那样placeholder，它成功了
