Untitled

<?php
    $src = '';
    if (ISSET($_FILES['upload'])) {
        // get file data from upoad
        // http://php.net/manual/en/reserved.variables.files.php#89674
        $data = $_FILES['upload']['tmp_name'];
        // file_get_contents — Reads entire file into a string
        // base64_encode — Encodes data with MIME base64
        $base64 = base64_encode(file_get_contents($data));
        // mime_content_type — Detect MIME Content-type for a file
        $type = mime_content_type($data);
        $src = '<img src="data:'.$type.';base64,'.$base64.'"/>';
    }
?>
<!DOCTYPE html>
<head>
</head>
<body>
<form action="" method="post" enctype="multipart/form-data">
    Select image to upload:
    <input type="file" name="upload">
    <input type="submit" value="Upload Image" name="submit">
</form>
<?php echo $src; ?>
</body>
</html>