Home php教程 PHP源码 php中PHP 的 $_POST、$HTTP_RAW_POST_DATA 和 php://input有什么不同

php中PHP 的 $_POST、$HTTP_RAW_POST_DATA 和 php://input有什么不同

Jun 08, 2016 pm 05:19 PM
data nbsp php post raw

$_POST、$HTTP_RAW_POST_DATA 和 php://input都可以接受数据了,那么它们三者的区别到底在哪里呢,我们来看来看这篇文章是如何介绍的。

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Mac Pro 电脑编译安装了 PHP 5.6.21,先前的系统运行时报如下警告级错误:
Deprecated: Automatically populating $HTTP_RAW_POST_DATA is deprecated and will be removed in a future version. To avoid this warning set 'always_populate_raw_post_data' to '-1' in php.ini and use the php://input stream instead.

意思是 自动变量 $HTTP_RAW_POST_DATA 已过时,将来会被移除,使用 php://input 流方式代替!
 
 
总结:区别 PHP 的 $_POST、$HTTP_RAW_POST_DATA 和 php://input
 
1、HTML

enctype Attribute

application/x-www-form-urlencoded  传送之前所有的字符都会被encoded,(spaces 被转换为+、特殊字符被转换为ASCII HEX)

multipart/form-data  没有字符被encoded,一般用upload
text/plain Spaces被转换为 + ,但是特殊字符不会被encoded
For example, the key-value pairs
name: Jonathan Doe
age: 23
formula: a + b == 13%!
are encoded as the following raw data:
name=Jonathan+Doe&age=23&formula=a+%2B+b+%3D%3D+13%25%21

$_POST

Array

(

    [name] => Jonathan Doe

    [age] => 23

    [formula] => a + b == 13%!

)


$HTTP_RAW_POST_DATA

print_r($GLOBALS['HTTP_RAW_POST_DATA']);

name=Jonathan+Doe&age=23&formula=a+%2B+b+%3D%3D+13%25%21

php://input


$post_data = file_get_contents('php://input');
print_r($post_data);

name=Jonathan+Doe&age=23&formula=a+%2B+b+%3D%3D+13%25%21
name=Jonathan+Doe&age=23&formula=a+%2B+b+%3D%3D+13%25%21
 
2、$_POST

$_POST是最常用的获取表单的方式,它是以关联数组方式组织提交的数据,并对此进行编码处理,如urldecode,甚至编码转换,识别的数据类型是PHP默认识别的数据类型 application/x-www.form-urlencoded
无法解析如 text/xml,application/json,soap 等非 application/x-www.form-urlencoded 数据类型的内容
 
3、$HTTP_RAW_POST_DATA

PHP默认识别的数据类型是application/x-www.form-urlencoded,用Content-Type=application/json 类型,提交的POST数据这时候 $_POST 就无法获取到了,但是使用 $GLOBALS['HTTP_RAW_POST_DATA'] 可以获取到。因为在PHP无法识别 Content-Type 的时候,就会把 POST 数据填入到 $HTTP_RAW_POST_DATA 中。
设置 php.ini 中的 always_populate_raw_post_data 值为 On 才会生效
当 $_POST 可以取到值时 $HTTP_RAW_POST_DATA 为空
不能用于 enctype="multipart/form-data"
PHP7中已经移除了这个全局变量,用 php://input 替代,使用 always_populate_raw_post_data 会导致在填充 $HTTP_RAW_POST_DATA 时产生 E_DEPRECATED 错误。 请使用 php://input 替代 $HTTP_RAW_POST_DATA, 因为它可能在后续的 PHP 版本中被移除。 设置always_populate_raw_post_data 为 -1 (这样会强制 $HTTP_RAW_POST_DATA 未定义,所以也不会导致 E_DEPRECATED的错误) 来体验新的行为。
 
4、php://input

php://input 可通过输入流以文件读取方式取得未经处理的 POST 原始数据,允许读取 POST 的原始数据。和 $HTTP_RAW_POST_DATA 比起来,它给内存带来的压力较小。
不需要任何特殊的 php.ini 设置
不能用于 enctype="multipart/form-data"
 
总结

1、如果是 application/x-www-form-urlencoded 和 multipart/form-data 格式 用 $_POST;
2、如果不能获取的时候比如 text/xml、application/json、soap,使用 file_get_contents('php://input');

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