Examples of three methods for php to obtain POST data: three methods for post

Examples of three methods for php to obtain POST data: three methods for post

Three methods for php to obtain POST data

Method 1, $ _ POST

$ _ POST or $ _ REQUEST stores PHP formatted data in the form of key => value.

Method 2: Use file_get_contents ("php: // input ")

For POST data without Content-Type specified, you can use file_get_contents ("php: // input"); to obtain the original data. In fact, this method is used to receive any POST data using PHP. Content-Type, including binary file streams, is also feasible.

Compared with $ HTTP_RAW_POST_DATA, it puts less pressure on memory and does not require any special php. ini settings.

Php: // input cannot read POST data whose Content-Type is multipart/form-data. You must set always_populate_raw_post_data in php. ini to On.

Php: // input cannot read $ _ GET data. The reason is that the $ _ GET data is written in the PATH field of the http Request header as query_path, rather than in the http Request body.

Method 3: Use the global variable $ GLOBALS ['HTTP _ RAW_POST_DATA ']

In $ GLOBALS ['HTTP _ RAW_POST_DATA '], raw POST data is stored.

However, whether the POST data is saved in $ GLOBALS ['HTTP _ RAW_POST_DATA '] depends on the centent-Type setting. Only when PHP cannot recognize the Content-Type, the POST data is filled in the variable $ GLOBALS ['HTTP _ RAW_POST_DATA '] as is, such as Content-Type = application/x-www-form-urlencoded, the variable is empty.

In addition, it cannot read POST data whose Content-Type is multipart/form-data. You also need to set php. in ini, if the always_populate_raw_post_data value is On, PHP will always fill in the POST data with the variable $ http_raw_post_data.

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