How can HTML5 elements like <progress> be used to show upload progress without JavaScript in PHP?

To show upload progress without JavaScript in PHP using HTML5 elements like <progress>, you can utilize PHP's built-in session handling to track the progress of the upload. By updating the session variable with the progress percentage during the upload process, you can then retrieve this value and display it using the <progress> element in the HTML form. 

&lt;?php
session_start();

if ($_SERVER[&#039;REQUEST_METHOD&#039;] == &#039;POST&#039; &amp;&amp; isset($_FILES[&#039;file&#039;])) {
    $file = $_FILES[&#039;file&#039;];
    
    // Check if file is uploaded
    if ($file[&#039;error&#039;] === UPLOAD_ERR_OK) {
        $fileSize = $file[&#039;size&#039;];
        $uploadedSize = 0;
        
        // Open the file for reading
        $handle = fopen($file[&#039;tmp_name&#039;], &#039;rb&#039;);
        
        // Calculate the progress percentage and update session variable
        while (!feof($handle)) {
            $uploadedSize += strlen(fread($handle, 8192));
            $_SESSION[&#039;upload_progress&#039;] = min(100, 100 * $uploadedSize / $fileSize);
        }
        
        fclose($handle);
    }
}

?&gt;

&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Upload Progress&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;form method=&quot;post&quot; enctype=&quot;multipart/form-data&quot;&gt;
        &lt;input type=&quot;file&quot; name=&quot;file&quot;&gt;
        &lt;progress value=&quot;&lt;?php echo isset($_SESSION[&#039;upload_progress&#039;]) ? $_SESSION[&#039;upload_progress&#039;] : 0; ?&gt;&quot; max=&quot;100&quot;&gt;&lt;/progress&gt;
        &lt;input type=&quot;submit&quot; value=&quot;Upload&quot;&gt;
    &lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;

Keywords

HTML5 <progress> upload progress PHP without JavaScript

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