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Ajax calling PHP and getting Return value

Not used Javascript -> Ajax -> PHP -> Javascript before and I am struggling to pick-up the return value. Ajax is calling the PHP, but all I am getting back is the HTML for the web page. Can anyone see what I am doing wrong?

Javascript: -

onChange: function(value, text, $selectedItem) {
    jQuery.ajax({ url : 'index.php', type : 'post', data : { action: 'getTest', param : text },
                    success: function(result){
                      console.log('Sucess',result);
                    },
                      failure: function(result){ console.log('Failed'); }
                    });
}

PHP: -

$_action = isset($_Post['action']) ? $_Post['action'] : '0';
if ($_action == 'getTest') {
  $test = $_Post['param'];
  echo $test;
  exit;
}

As I said, RESULT just seems to contain the page's HTML and not the expected string value.

Thanks

Solution

  • Your post variable is with small caps letters. However the Variable should be full caps ($_POST). So your php is not going into the if statement.

    https://www.php.net/manual/en/reserved.variables.post.php

    To debug these kind of issues start logging variables like $_action and check if their value is what you expect it to be. Then check if the if statement actually fires, etc. until you find the error.