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POHow is this PHP/IFRAME file upload working?
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  1. POHow is this PHP/IFRAME file upload working?
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    copied!<p><a href="http://www.ajaxf1.com/tutorial/ajax-file-upload-tutorial.html" rel="nofollow">Check out this link</a>.</p> <p>How is the code working out? I mean the <code>src</code> attribute of IFRAME is set to <code>#</code> then how does <code>upload.php</code> get to know that the form was submitted?</p> <h1>Here is the code : <code>index.php</code> :</h1> <pre><code>&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt; &lt;title&gt;Max's AJAX File Uploader&lt;/title&gt; &lt;link href="style/style.css" rel="stylesheet" type="text/css" /&gt; &lt;script language="javascript" type="text/javascript"&gt; &lt;!-- function startUpload(){ document.getElementById('f1_upload_process').style.visibility = 'visible'; document.getElementById('f1_upload_form').style.visibility = 'hidden'; return true; } function stopUpload(success){ var result = ''; if (success == 1){ result = '&lt;span class="msg"&gt;The file was uploaded successfully!&lt;\/span&gt;&lt;br/&gt;&lt;br/&gt;'; } else { result = '&lt;span class="emsg"&gt;There was an error during file upload!&lt;\/span&gt;&lt;br/&gt;&lt;br/&gt;'; } document.getElementById('f1_upload_process').style.visibility = 'hidden'; document.getElementById('f1_upload_form').innerHTML = result + '&lt;label&gt;File: &lt;input name="myfile" type="file" size="30" /&gt;&lt;\/label&gt;&lt;label&gt;&lt;input type="submit" name="submitBtn" class="sbtn" value="Upload" /&gt;&lt;\/label&gt;'; document.getElementById('f1_upload_form').style.visibility = 'visible'; return true; } //--&gt; &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="container"&gt; &lt;div id="header"&gt;&lt;div id="header_left"&gt;&lt;/div&gt; &lt;div id="header_main"&gt;Max's AJAX File Uploader&lt;/div&gt;&lt;div id="header_right"&gt;&lt;/div&gt;&lt;/div&gt; &lt;div id="content"&gt; &lt;form action="upload.php" method="post" enctype="multipart/form-data" target="upload_target" onsubmit="startUpload();" &gt; &lt;p id="f1_upload_process"&gt;Loading...&lt;br/&gt;&lt;img src="loader.gif" /&gt;&lt;br/&gt;&lt;/p&gt; &lt;p id="f1_upload_form" align="center"&gt;&lt;br/&gt; &lt;label&gt;File: &lt;input name="myfile" type="file" size="30" /&gt; &lt;/label&gt; &lt;label&gt; &lt;input type="submit" name="submitBtn" class="sbtn" value="Upload" /&gt; &lt;/label&gt; &lt;/p&gt; &lt;iframe id="upload_target" name="upload_target" src="#" style="width:0;height:0;border:0px solid #fff;"&gt;&lt;/iframe&gt; &lt;/form&gt; &lt;/div&gt; &lt;div id="footer"&gt;&lt;a href="http://www.ajaxf1.com" target="_blank"&gt;Powered by AJAX F1&lt;/a&gt;&lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <hr> <h1><code>upload.php</code> :</h1> <pre><code>&lt;?php // Edit upload location here $destination_path = getcwd().DIRECTORY_SEPARATOR; $result = 0; $target_path = $destination_path . basename( $_FILES['myfile']['name']); if(@move_uploaded_file($_FILES['myfile']['tmp_name'], $target_path)) { $result = 1; } sleep(1); ?&gt; &lt;script language="javascript" type="text/javascript"&gt;window.top.window.stopUpload(&lt;?php echo $result; ?&gt;);&lt;/script&gt; </code></pre>
 

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