How to receive json data in php

PHP can receive json data through the file_get_contents method. When receiving such a request, the bottom layer of php will parse the string into the $_POST variable, and then obtain the json data through this variable

PHP receives json dataIt can be obtained in the following ways in PHP:

file_get_contents("php://input");　

Analysis:

php does web page form submission

In the early years of web form submission, $_POST was used to obtain request parameters. In fact, the http request header was in the form of kv value, such as:

#When php receives this kind of request, the php underlying system will parse this string and store it in the $_POST variable, so you can pass $_POST in php Get these parameters.

Upload file http request header

Content-Type has changed to multipart/form-data format. Data acquisition in this format is also processed at the bottom of PHP. Ordinary non-file parameters can also be obtained through $_POST, and file parameters can be obtained through $_FILES.

php gets json format data

The json format data refers to the http header body string which is a json format string. This cannot be obtained through $_POST in PHP, and the bottom layer of PHP does not handle this method. After obtaining the data in the body, you can directly json_decode to get the data in object format.

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