PHP Ajax文件异步上传代码（XMLHttpRequest）例子

PHP 代码：

$fileName = $_FILES['afile']['name'];
$fileType = $_FILES['afile']['type'];
$fileContent = file_get_contents($_FILES['afile']['tmp_name']);
$dataUrl = 'data:' . $fileType . ';base64,' . base64_encode($fileContent);

$json = json_encode(array(
'name' => $fileName,
'type' => $fileType,
'dataUrl' => $dataUrl,
'username' => $_REQUEST['username'],
'accountnum' => $_REQUEST['accountnum']
));

echo $json;

Html 及 JS 代码

xhr.send(FormData) Example