Get Javascript Variable value in PHP variable

Question

 var val;
 $('select').on('change', function() {
 alert( this.value );
 val = this.value;
 })
 
 <?php
echo $variable = "<script>document.write(val)</script>";
?>

<select>
 <option value="1">One</option>
 <option value="2">Two</option>
 <option value="3">Three</option>
 <option value="4">four</option>
</select>

I want to get the value of the selected box and save it in a PHP variable. I want to save and echo val variable. Please help

• Afsar: read this stackoverflow.com/questions/14354147/…
• Jomoos: Read this: What is the difference between client-side and server-side programming?
• Zaid Butt: Then What should I do for getting selected value in a php variable
• Shafiqul Islam: use ajax for this . php server side so need to use ajax for this condition
• Zachary Craig: Possible duplicate of How to pass jQuery variables to PHP variable?

Answer 1

use this code for use variable

 <?php
 session_start();
 echo $_SESSION['php_value'];
 ?>
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
 <script>
 function getValue(obj){
 var value = obj.value;
 $.ajax({
 type:"POST",
 url: 'edit.php',
 data: "val="+ value,
 dataType: 'text',
 async: false,
 cache: false,
 success: function ( result ) {
 window.location.reload();
 }
 });
}
</script>
<select onchange="getValue(this)">
<option value="1" <?php if($_SESSION['php_value'] == 1) echo 'selected';?>>One</option>
<option value="2" <?php if($_SESSION['php_value'] == 2) echo 'selected';?>>Two</option>
<option value="3" <?php if($_SESSION['php_value'] == 3) echo 'selected';?>>Three</option>
<option value="4" <?php if($_SESSION['php_value'] == 4) echo 'selected';?>>four</option>
</select>

then create edit.php file

<?php
 session_start();
 $_SESSION['php_value'] = $_REQUEST['val'];
?>

• Zaid Butt: I need a value in a php variable. So where is a variable? help me please
• Aluan Haddad: So great to see three levels of language nesting use the src attribute.
• Aluan Haddad: JavaScript inside HTML is bad. JavaScript inside HTML inside PHP is worse.
• Shafiqul Islam: i have just answer it , this is not need to structure, when question teller use , he will use it as structure
• Zaid Butt: @ShafiqulIslam Thanks for your help. Your code is working fine. But I have little problem. <script src="ajax.googleapis.com/ajax/libs/jquery/2.1.1/…> when I included it in my code it reflects and dropdown is not working. and without it when i select dropdown then a popup appears and ask to reload page

Answer 2

Ajax can do this. Google it, and check out api.jquery.com and look at the ajax functions, .ajax(), .post(), .get(), .load(), etc.

As for your specific question, here is what you would do:

//Javascript file
$.post('my_ajax_receiver.php', 'val=' + $(this).val(), function(response) {
 alert(response);
 });

});

//PHP file my_ajax_receiver.php
<?php
 $value = $_POST['val'];
 echo "$value";
?>

• Toxide82: orignal answer here [stackoverflow.com/questions/5202070/…