convert javascript variable to a php variable using ajax

Question

I have below code. I don't know much about ajax. I want below input s_amount to convert as a php variable before submitting the form that it is in. There are some syntax errors where param1 in php code is not recognised. I don't know my order is correct or not. How I get this work.

<input type="text" name="s_amount" >
<script>
    $.ajax({
    url: 'payment.php',
    type: 'POST',
    dataType: 'text',
    data: {param1:$("input[type='text'[name='s_amount']").val()},
    })
    .done(function(response) {
        console.log("response");
        responsen=response+1;
    })
    .fail(function() {
    console.log("error");
    })
    .always(function() {
    console.log("complete");
    });
   $param1=done(param1);
</script>

<?php
    $myphpvariable= $_POST['param1'];
    echo 'this is my php variable: '.$myphpvariable;
?>

If anybody can help me to find the error with my code I will be very grateful. I can't find where i got wrong — user3138830, Dec 28 '13 at 04:05
From your code, you haven't declared `responsen`, is this a typo? — Graham Walters, Dec 28 '13 at 04:10

Gourav · Answer 1 · 2013-12-28T04:49:38.053

0

The below code will help you in understanding the concept.

 <input type="text" name="s_amount" >
 <script>


 $.ajax({
     type: "POST",
    context: "application/json",
    url: "payment.php",
    data:{param1:$("input[name='s_amount']").val();},
    success: function(msg) 
    {
         alert(msg);
    }
    })

 </script>

payment.php

 <?php
     $myphpvariable= $_POST['param1'];
      echo 'this is my php variable: '.$myphpvariable;
 ?>

The main thing here was the line

  {param1:$("input[type='text'[name='s_amount']").val()}

it was not fetching the value from the texbox. change it to

  {param1:$("input[name='s_amount']").val();}

I hope you wanted to achieve this.

edited Dec 28 '13 at 04:49

answered Dec 28 '13 at 04:07

Gourav

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Error message gives as Undefined index: param1 in php code – user3138830 Dec 28 '13 at 04:19
try changing variable name. from param1 to id. – Gourav Dec 28 '13 at 04:20
It didn't work. does the variable in $_post contain $? – user3138830 Dec 28 '13 at 04:28
For me its working fine... Use the above code and check once again. – Gourav Dec 28 '13 at 04:36
Will you plese tell me to where this php lines should come? Is it ok to put just after the end of script or should I do some binding thing just like click on a button? – user3138830 Dec 28 '13 at 04:47
The php lines should be present in payment.php page. see the updated answer. – Gourav Dec 28 '13 at 04:49
I have no luck. same error – user3138830 Dec 28 '13 at 04:57
something or somewhere you are going wrong. try to figure out. – Gourav Dec 28 '13 at 04:59
How this php lines know that the variable param1 is inside the script????? – user3138830 Dec 28 '13 at 05:03

convert javascript variable to a php variable using ajax

1 Answers1