如何根据PHP中选择框选项的值填充文本框

Question

I have a form like this

<form >
<select name = "person">
  <option name ="first" value= "first">@$_SESSION['person']</optio>
  .
  .
  .
 </select>

and two text boxes

<input type="text" name = "name" value ="" >
<input type ="text" name ="address" value= "">
</form>

Please explain with syntax ,how to fill the text boxes base on the option selected in the drop down list.

Answer 1

Another way to do this is dynamic with javascript or jquery so you don't have to reload the page. like this:

<select name="mySelect" onchange="document.getElementById('myTextBox').value = this.value">
 <option value="first">first</option>
 <option value="second">second</option>
</select>

<input type="text" id="myTextBox" value="" />

Answer 2

If you want to have it done without a page reload this is the code:

<select name="mySelect" onchange="document.getElementById('myTextBoxAddress').value = this.value.substr(0, this.value.indexOf('_')); document.getElementById('myTextBoxName').value = this.value.substr(this.value.indexOf('_') + 1, this.value.length);">
 <option value="<?=$_SESSION[0]['addr'] . '_' . $_SESSION[0]['name'];?>"><?=$_SESSION[0]['name'];?></option>
 <option value="<?=$_SESSION[1]['addr'] . '_' . $_SESSION[1]['name'];?>"><?=$_SESSION[1]['name'];?></option>
</select>

<input type="text" id="myTextBoxAddress" value="" />
<input type="text" id="myTextBoxName" value="" />

I put both the address and the name values in the value of the options seperated by a '_'. In the onchange i divided the value string again and filled the inputs with them.

Answer 3

<select name="person" onchange="this.form.submit()">
<option value="Peter">@$_SESSION['person']</option>
.
.
.
</select>

<input type="text" name = "name" value ="<?php echo $_POST['person'] ?>" >

This would echo the value Peter

Hope this helps ;)

Answer 4

you need a function to get person data when you sumbit the person id to it and return it as an object to use it and the options of the "select" tag should hold the person id as value like this :

<select name="person" onchange="this.form.submit()">
       <option name ="first" value= "first">@$_SESSION['person']</option>
       .
       .
       .
    </select>

<input type="text" name = "name" value ="<?php echo $person->name ?>" >
<input type ="text" name ="address" value= "<?php echo $person->address?>">