get value before form submit

rahaiffi

i have a form that select menu where user pick the number and from the number,show the number of form. For example, if user pick 2, that the popup window show with the 2 form. i do a few coding but it did't work. So please help me.

<select name="select">
          <option>~~Please Pick~~</option>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
          <option value="4">4</option>
        </select>
        </label>

	<?php $i = $select ?>
	<input name="Form" type="button" id="Form" onclick="location='try.php?test=<? echo $i; ?>'" value="Form">

the value from $i use for loop for how many form that user pick the number.So i come out with url.But the result value of $i= NULL.

TheFinnisher

Hi rahaiffi,

I don't think it's possible with PHP as a server-side language to do that before form submit. You would have use to use some client-side script such as javascript.

I think if you are going to use the "onclick" behavior anyway, you may give javascript a try.

You could also make the form select an onChange and make that submit/refresh the form on which you could output a button for your try.php id with the selected value.

Hence (pseudo code):

and then

<?php if(isset($_POST['userselection'])){
$tryid = $_POST['userselection'];
} else {
$tryid = '';
}
?>
        <input name="Form" type="button" id="Form" onclick="location='try.php?test=<? echo $tryid; ?>'" value="Form">

rahaiffi

i try but i still did't work...test value still NULL
please help me..