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POHow to properly send POST data?
 

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  1. POHow to properly send POST data?
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    <p>I am trying to use AJAX to improve my login system to run without refreshing the page. I'm quite new to ajax. The tutorials I've found all use GET. I don't want to use get. Here is my code:</p> <p>login.php (I removed the CSS code from this)</p> <pre><code>&lt;html&gt; &lt;script type="text/javascript" src = "login/loginJS.js"&gt;&lt;/script&gt; &lt;body&gt; &lt;center&gt; &lt;div class="rounded"&gt; &lt;form method='POST' action = "processLogin.php"&gt; Username:&lt;input type="text" class = "input1" name = "username"/&gt;&lt;br&gt; Password:&lt;input type="password" class = "input1" name = "password"/&gt;&lt;br&gt; Remember Me?&lt;input type="checkbox" name = "remember"/?&gt;&lt;br&gt; &lt;?php session_start(); echo'&lt;p id="errorField" class="error"&gt;&lt;/p&gt;'; ?&gt; &lt;input type="submit" value = "Login" class = "button" onclick='process()'/&gt; &lt;b&gt;&lt;p&gt;New User? &lt;a href="register.php"&gt;Register&lt;/a&gt;&lt;/p&gt;&lt;/b&gt; &lt;/form&gt; &lt;/div&gt; &lt;/center&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>loginJS.js</p> <pre><code>xmlHttp = createXmlHttpRequestObject(); function createXmlHttpRequestObject() { var xmlHttp; if (window.ActiveXObject){ try{ xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); }catch(e){ xmlHttp = false; } }else{ try{ xmlHttp = new XMLHttpRequest(); }catch(e){ xmlHttp = false; } } if(!xmlHttp){ alert("The XML Http Request Failed"); }else{ return xmlHttp; } } function process(){ if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0){ login = encodeURIComponent(document.getElementById("loginField").value); xmlHttp.open("POST", "login/processLogin.php",true); xmlHttp.onreadystatechange = handleServerResponse; xmlHttp.send(); }else{ setTimeout('process()',1000); } } function handleServerResponse(){ if(xmlHttp.readyState == 4){ if(xmlHttp.status == 200){ xmlResponse = xmlHttp.responseXML; xmlDocumentElement = xmlResponse.documentElement; message = xmlDocumentElement.firstChild.data; document.getElementById("errorField").innerHTML = message; } } } </code></pre> <p>processLogin.php</p> <pre><code> &lt;?php session_start(); header('Content-Type: text/xml'); echo '&lt;?xml version="1.0" encoding="UTF-8" standalone="yes" ?&gt;'; echo "&lt;response&gt;"; $username = $_POST['username']; $password = $_POST['password']; if ($username == '' or $password == '') { echo 'The username/password fields may not be blank.'; }else{ echo 'This is a test'; } echo "&lt;/response&gt;"; ?&gt; </code></pre> <p>So my question is, what should I do to take the variables inside the input text and password field, to put as a post variable, then to send it with the javascript. I just need to send the username and password fields. To see the website, <a href="http://rukiryo.bugs3.com" rel="nofollow">http://rukiryo.bugs3.com</a> That is what the website looks like. The login button works when I use my page-refresh method, but I can't figure out the last steps to make it work for non-refresh. </p> <p>Thanks, Alex</p>
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    1. COPass the parameters as a string in xmlHttp.send(). You need to encode the values and present them in param=encoded_value&param2=encoded_value2 format. http://beradrian.wordpress.com/2007/07/19/passing-post-parameters-with-ajax/
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      1. POHow to properly send POST data?
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    2. COAren't you using jQuery?
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    3. COYou should be checking to see if the browser supports the native XHR object. Unless you need to support < IE6 then instead use `var xhr = new XMLHttpRequest();`
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      1. POHow to properly send POST data?
      1. USJulian Feliciano
 

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