我发现'default'=>'Please select'
不能与HTML5必需属性一起使用.
这确实有效:
$listOfValues = [1 => 'Choice 1'];
Form::select('fieldname',[null=>'Please Select'] + $listOfValues);
If you don't like modern PHP syntax,
$listOfValues = array(1 => 'Choice 1');
$listOfValues[null] = 'Please Select';
Form::select('fieldname', $listOfValues);
但关键是要为空值设置一个标签.