PHP: Get the value from javascript using getElementbyId

Question

I would take the value of the combobox by using getelementbyID to PHP variable, And The Code Like This

<select name="PROPINSI" onchange="document.getElementById('KOTAA').value = this.value" >
    <option value="a">a</option>
    <option value="b">b</option>            
 </select>

<select name="KOTA" id="KOTAA">
     <?php
         $propinsi = ; //in this variable, I want take this value

         $sqll="SELECT kota FROM master_propinsi WHERE propinsi = '$propinsi'";
                   $hasill= mysql_query($sqll);


                    while($dataa = mysql_fetch_array($hasill))
                    {            
                      echo "<option value='$dataa[kota]'>$dataa[kota]</option>";             
                    }

    ?>
 </select>

Can SomeOne Help Me?

I really appreciate your answer Thanks

How to get value From Combo Box with ID="KOTAA" to variable $propinsi

Ganesh RJ · Accepted Answer · 2012-12-21 07:55:17Z

2

You cannot pass variable values from the current page javascript to the current page PHP code... PHP code runs at the server side and it doesn't know anything about what is going on on the client side.

You need to pass variables to PHP code from html-form using another mechanism, such as submitting form on GET or POST methods.

answered Dec 21, 2012 at 7:55

Ganesh RJ

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4 Comments

MudMan23 Over a year ago

thanks for answer, I have try the submit, like onChange="this.form.submit()" and in $propinsi = $_GET[PROPINSI], but it not work.., anyhting Wrong with my code?

Ganesh RJ Over a year ago

Is it inside the form tag?

MudMan23 Over a year ago

yes, <select name="PROPINSI" onchange="this.form.submit()"> inside Select tag

MudMan23 Over a year ago

It Resolve, with this.form.submit, the problem is $_GET, my Form method is $_POST. Thanks

user1457108 · Accepted Answer · 2012-12-21 07:57:19Z

0

You can't put javascript code in PHP. Although, there is an alternative: Ajax

answered Dec 21, 2012 at 7:57

user1457108

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