在按钮单击中调用php函数

Question

I need to call the PHP function when I click the button in html page.

<script>
 $(document).ready(function(){
    $('#submit').click(function() {

    $.ajax({
    type: "POST",
    url: "hello.php",
    }).done(function(  ) {
    alert( "Data Saved: ");
    });    
});

});
</script>

<input type="submit" name="submit"  id="submit" value="Buy!" />

Hello.php:

   <?php
   if(isset($_REQUEST['submit']))
   {
      counterminus();
   }
   function  counterminus()
   {
      echo "method called";
   }

I have tried the above method but its not working properly.I need to print the string in the counterminus() method when i click the button.

Answer 1

<script>
$(document).ready(function(){
$('#submit').click(function() {

 var val = $('#submit').val();
$.ajax({
type: "POST",
data:"var="+val,
url: "hello.php",
}).done(function(  ) {
alert( "Data Saved: ");
});    

});

});

the above script will POST the variable name var with the value of the submit to hello.php

on hello.php

 echo $_POST['var'];

will result in "buy!"

so

  if(isset($_POST['var'])){
  .....
  .....

Answer 2

Everything looks fine to me, except that you do not print the data returned by your AJAX call, which shall be provided as a parameter to your done callback.

Try this:

$.ajax({
    type: "POST",
    url: "hello.php",
}).done(function(data) {
    alert( "Data Saved: " + data);
});    

Answer 3

if by any case you put the input type="submit" button inside a form tag. you should stop the event from executing.. put this at your ajax call. Because the form will post before the ajax call completes.

<script>
$(document).ready(function(){
      $('#submit').click(function(e) {
               e.preventDefault();
               $.ajax({
                     type: "POST",
                     url: "hello.php",
                      }).done(function(  ) {
                             alert( "Data Saved: ");
                                });    
         });

         });
</script>

Answer 4

pass a variable submit with url

try the following code

$.ajax({
        type: "POST",
        url: "1.php?submit=",
        }).done(function( data ) {
        alert( "Data Saved: "+data);
        }); 

or u can pass values as data

$.ajax({
            type: "POST",
            url: "1.php",
            data: {submit:""},
            }).done(function( data ) {
            alert( "Data Saved: "+data);
            }); 

Answer 5

Use exit in php. now it returns "method called" string

   if(isset($_REQUEST['submit']))
   {
      counterminus();
   }
   function  counterminus()
   {
      echo "method called";
      exit;
   }