Question

I want to refresh the same page and display the entered value in text box on the same page after clicking the link or button.

I have the following code:

 <?php 
 echo '<h3>Fee Payment</h3>';

 echo "<form id='myFormId' name='myFormName'>";
 echo " <input type='text' name='myTextField'>";
 echo "<a href='{$_SERVER['PHP_SELF']}?student_no=myTextField'> Search Student</a>";


 if (!(isset($_GET[student_no])))
 { 
    echo "No Student is available.";
 } 
 else
 {
    $student_no = $_GET['student_no'];
    echo "Student NO:".$studen_no;
 }
 ?>

Please guide me how to achieve the goal and whats the error my code.

Answer 1

What you want is AJAX. I am just providing you an example of how you can proceed by using jQuery, but you can use any other library / framework or any other way also. You can check this article also for more usability details.

In the main page:-

<?php
echo '<h3>Fee Payment</h3>';

echo "<form id='myFormId' name='myFormName'>";
echo "<input type='text' name='myTextField' id='myTextField' />";
echo '<a href="javascript:void()" id="inline_submit_a">Search Student</a>';
echo "</form>";
?>

<script type="text/javascript">
$('#inline_submit_a').click(function(evt){
    $.ajax({
       type: "GET",
       url: "handler.php",
       data: {text:$('#myTextField').val()}
    });

    evt.preventDefault();
    return false;
});
</script>

In the “handler.php” page:-

<?php
if (!(isset($_GET[student_no])))
{ 
   echo "No Student is available.";
} 
else
{
   $student_no = $_GET['student_no'];
   echo "Student NO:".$student_no;
}
?>

You can write all the logic related to the database in the “handler.php” page.

Hope it helps.