如何通过form表单直接上传文件到阿里云oss？
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表单如下：
<?php
$access_id = 'LTAIXzp40zgh8qTl';
$access_key = '241sdlfjlskdjflkssdfsdf';
$filename="/img/test.png";
$url='http://buckname.oss-cn-beijing.aliyuncs.com';//更改成你自己的地址
$policy = '{"expiration": "2125-01-01T12:00:00.000Z","conditions":[{"bucket": "bucketname" },["content-length-range", 0, 104857600]]}';
$policy = base64_encode($policy);
$signature = base64_encode(hash_hmac('sha1', $policy, $access_key, true));//生成认证签名
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<div>文件上传</div>
<form action="<?php echo $url;?>" method="post" enctype="multipart/form-data">
<label for="file">选择文件:</label>
<input type="hidden" name="OSSAccessKeyId" id="OSSAccessKeyId" value="<?php echo $access_id; ?>" />
<input type="hidden" name="policy" id="policy" value='<?php echo $policy; ?>' />
<input type="hidden" name="signature" id="signature" value="<?php echo $signature; ?>" />
<input type="hidden" name="key" id="key" value="<?=$filename?>" />
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="确定" />
</form>
</body>
</html>
by thinkfuture
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