Summary of the methods of sending get and post requests by php
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Method 1: use file_get_contents to get the content in get:
Method 2: open url with fopen and get the content by get:
Method 3: use the file_get_contents function to obtain url by post
Method 4: open url with fsockopen function and obtain complete data by get, including header and body,fsockopen need to be enabled by allow_url_fopen option in PHP.ini
Method 5: open url with fsockopen function and obtain complete data by POST, including header and body
