以yii2格式从另一个字段中获取数据

问题描述:

I'm making a form with yii2, now I have two field:

 <?php echo $form->field($model, 'Protocol')->textInput(['maxlength' => true])->dropDownList(
                    array("rtsp://"=>"rtsp","rsmt://"=>"rsmt","http://"=>"http"),     // Flat array ('id'=>'label')
                    ['prompt'=>'Select']     // options
                ); ?>

 <?php echo $form->field($model, 'url')->textInput(['maxlength' => true]); ?>

They look like this: form

How can I take the selection from Protocol's drop down list and automatically add it to the below URL field? Like this: enter image description here I type the http:// in the field manually, is there anyway I can make it automatic?

我正在用yii2创建一个表单,现在我有两个字段: p> &lt;?php echo $ form-&gt; field($ model,'Protocol') - &gt; textInput(['maxlength'=&gt; true]) - &gt; dropDownList( array(“rtsp”) ://“=&gt;”rtsp“,”rsmt://“=&gt;”rsmt“,”http://“=&gt;”http“),//平面数组('id'=&gt;' label') ['prompt'=&gt;'选择'] // options ); ?&gt; &lt;?php echo $ form-&gt; field($ model,'url') - &gt; textInput(['maxlength'=&gt; true]); ?&gt; code> pre>

他们看起来像这样: p>

我怎样才能参加 从协议的下拉列表中选择并自动将其添加到以下URL字段? 像这样: 我手动在字段中输入 http:// code>,无论如何我可以自动进行吗? p>

Add onchange event in your 'protocol' dropdownList. show below code

<?= $form->field($model, 'Protocol')->dropdownList(["rtsp://"=>"rtsp","rsmt://"=>"rsmt","http://"=>"http"], [
    'onchange'=>'$( "#'.Html::getInputId($model, 'url').'").val($(this).val());'

    ]) ?>

<?= $form->field($model, 'url')->textInput(['maxlength' => true]);
?>