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PHP 模拟$_PUT实现代码

Jun 06, 2016 pm 08:33 PM
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PHP里有$_GET,$_POST,但是没有$_PUT,所以如果需要使用它的话,则你不得不自己模拟一下

PHP里有$_GET,$_POST,但是没有$_PUT,所以如果需要使用它的话,则你不得不自己模拟一下:
代码如下:
$_PUT = array();
if ('PUT' == $_SERVER['REQUEST_METHOD']) {
parse_str(file_get_contents('php://input'), $_PUT);
}

通过php://input得到的数据是raw data,所以需要用parse_str解析一下。

不过需要说明的是,当表单是enctype="multipart/form-data"类型的时候(就是上传文件那种类型),这种方法是无效的(此时php://input为空),一旦PHP发现请求的Content-Type是multipart/form-data,就会无条件的代你处理表单数据,然后保存到$_FILES里,此时无法得到raw data,只能用一些偏门方法,以apache为例,修改httpd.conf(为了使用RequestHeader语法,请先激活header模块):
代码如下:

RequestHeader set Content-Type foobar


通过重置Content-Type请求头为foobar(只要不是multipart/form-data即可),此时php://input就有数据了,不过原本应有的$_FILES数据却不存在了,所以基本上只有演示上的意义,如果想得到raw data,只能自己根据数据生成,在PEAR里有类似的实现:HTTP_Request2_MultipartBody。

浏览器一般只允许使用GET/POST方法,虽然可以通过JS来发送PUT方法,但是还得编写代码,相对而言,使用命令行下的CURL命令则显得方便很多,在开发测试时很有用,所以学习一下还是必要的:

curl -X PUT http://www.domain.com/demo.php -d "id=1" -d "title=a"

这样就会通过PUT方法发送id, title数据,测试时demo.php的代码就类似上面的php://input,不细说了。

补充:注意php.ini里的always_populate_raw_post_data设置。
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