uploadprogress.php

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<?php
 
$json['apc_enabled'] = function_exists('apc_fetch');
 
if (isset($_GET['APC_UPLOAD_PROGRESS']) && !empty($json['apc_enabled'])) {
    $status = apc_fetch('upload_' . $_GET['APC_UPLOAD_PROGRESS']);
 
    if ($status) {
        $json['percent'] = (!empty($status['total']))
            ? $status['current'] * 100 / $status['total']
            : 0;
    }
}
 
echo json_encode($json);