After Validate (Same page) the value stay on the page

Question

Input(value) stay on the same page when click on "submit"(validation)

http://lab.iamrohit.in/cvalid/ The Code

<form action="" method="post">
<select name="type">
<option value="American">American Express</option>
<option value="Dinners">Diner's Club</option>
<option value="Discover">Discover</option>
<option value="Master">Master Card</option>
<option value="Visa">Visa</option>
</select>
<input type="text" name="cNum">
<button type="submit">Submit</button>
</form>

After click on submit , the input stay on the text box

Answer 1

You have not specified the action in your form that's why the form is by default is submitting to the same page. You can use autocomplete .

Autocomplete allows the browser to predict the value. When a user starts to type in a field, the browser should display options to fill in the field, based on earlier typed values.

<input type="text" name="cNum" autocomplete="off">

If you want form selected values be as selected after form subimmision, try this

$type = '';
$cNum  = '';
if(isset($_POST['submit'])){
  $type = $_POST['type'];
  $cNum = $_POST['cNum'];
 }
?>
<form action="" method="post">
 <select name="type">
    <option value="American" <?php if($type == 'American'):?>selected="selected"<?php endif;?>>American Express</option>
    <option value="Dinners"  <?php if($type == 'Dinners'):?>selected="selected"<?php endif;?>>Diner's Club</option>
    <option value="Discover" <?php if($type == 'Discover'):?>selected="selected"<?php endif;?>>Discover</option>
    <option value="Master"   <?php if($type == 'Master'):?>selected="selected"<?php endif;?>>Master Card</option>
    <option value="Visa"     <?php if($type == 'Visa'):?>selected="selected"<?php endif;?>>Visa</option>
</select>
  <input type="text" name="cNum" value="<?php echo $cNum;?>"/>
  <input type="submit" name="submit" value="submit"/>
</form>