Setting vars with an AJAX PHP POST DATA FORM ANSWER

[PMoney]

Okay so basically what I want to do is JAVASCRIPT posts Values to a PHP Webpage and then it does a bunch of IFs and Functions and then I want it to come back to the javascript and set some vars in the javascript that i can use right away to do some IFs and functions here is the example.

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function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            // set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
     
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
     http_request.responseText; /// Here i want to execute the answer coming back from UploadTest.PHP
and then IF (SOME_VAR_THAT_I_JUST_SET_WITH_THE_Http_request.responseText. == "") { DO THIS }
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   function get(obj) {
      var poststr = "field_myvideo_title=" + encodeURI( document.getElementById("field_myvideo_title").value ) +
                    "&field_myvideo_descr=" + encodeURI( document.getElementById("field_myvideo_descr").value );
          "&field_myvideo_keywords=" + encodeURI( document.getElementById("field_myvideo_keywords").value );
                    "&chlist[]" + encodeURI( document.getElementById("chlist[]").value );
          "&action_upload=" + encodeURI( document.getElementById("action_upload").value );
      makePOSTRequest('uploadtest.php', poststr);
   }


ANd then in Uploadtest.Php

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The pages does a bunch of functions and the output is as follows im using print_r() functions cuz its the only function i could figure out that would work to return some code to my ajax javascript
///////////
Print_R("var Something1 = $something_defined_by_php");
Print_R("var Something2 = $something_defined_by_php");
Print_R("var Something3 = $something_defined_by_php");
Print_R("var Something4 = $something_defined_by_php");
Print_R("var Something5 = $something_defined_by_php");
Print_R("var Something6 = $something_defined_by_php");



Is it possible to set vars with the return code??

[aanders1977]

Hi PMoney,

Have a look at w3schools.com, under the AJAX tab. They have a pretty good tutorial doing what you ask for.

Kind regards,
Anders