Communicating with a php script using jQuery

Question

I wrote a simple jQuery function to submit data from a textarea. The script returns the result of the computation. I get an error saying that recievedData isn't defined. When debugging with firebug I can see a response.

Here's my jQuery function.

$('#submitButton').click(
function(evt){
userCode = $('#answer').val();
$.ajax({
type : 'POST',
url : 'scripts/php/check_answer.php',
data : 'code=' + userCode,
dataType : 'text',
success : alert(recievedData)
});
evt.preventDefault;
});

And this is the php script

<?php

//sample string, to be taken as input from the user program.
$str = $_POST['code'];
//the array with the weights
$patterns = array (
    '/[:space]/' => 0, //whitespaces are free; need to add spaces too
    '/[a-zA-Z]/' => 10, //characters
    '/[0-9]/'   => 500, //digits
    '/[\+\-\/\*\%]/' => 10000, //arithmetic operators
    '/[\<\>]/' => 5000, //relational operators
    '/[\^\~\|\&]/' => 1000 , //bitwise operators
    '/[\=]/' => 250, //assignment operator
    '[\#]' => 100000 //No Macros
);

//default weight for characters not found is set here
$default_weight = 55;
$weight_total = 0;
foreach ($patterns as $pattern => $weight)
{
  $match_found =  preg_match_all ($pattern, $str, $match);
  if( $match_found )
  {
     $weight_total += $weight * $match_found;
  }
  else
  {
    //this part needs to be fixed
     $weight_total += $default_weight;
  }
}

echo $weight_total;

?>

It's coz recievedData isn't defined. ;-) Side note: if you decide to use that name in your application, I recommend spelling it "receivedData" -- and I'm not being snotty or pedantic; we spelled "received" incorrectly in our application and it haunted us for years! No joke! (Had to do with backwards compatibility) — Greg Pettit
– Greg Pettit, Commented Jan 19, 2012 at 5:41

Rajat Singhal · Accepted Answer · 2012-01-19 05:39:02Z

2

Write

success:function(data){alert(data);}

answered Jan 19, 2012 at 5:39

Rajat Singhal

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2 Comments

nikhil Over a year ago

That worked, one more doubt. If I wanted to call a named function instead of an anonymous function, what would I need to do?

craigmj Over a year ago

Just provide the function name, without inverted commas: success: successFunction, ...

Mif.ComicVN · Accepted Answer · 2012-01-19 12:09:08Z

1

Another way to post with jquery

$('#submitButton').click(
function(evt){
userCode = $('#answer').val();

$.post("scripts/php/check_answer.php", {code: userCode},
   function(data) {
     alert("Data Loaded: " + data);
   });

evt.preventDefault;
});

answered Jan 19, 2012 at 12:09

Mif.ComicVN

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