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POST field

• CURLOPT_POSTFIELDS

POST has two encoding

• application/x-www-form-urlencoded
• multipart/form-data
• http://php.net/manual/en/function.curl-setopt.php#refsect1-function.curl-setopt-notes

Curl Option

• http://php.net/manual/en/function.curl-setopt.php
• https://github.com/bagder/curl/blob/master/docs/libcurl/symbols-in-versions
• Number https://gist.github.com/blainesch/4626922

Curl error message

• https://curl.haxx.se/libcurl/c/libcurl-errors.html

Keep alive

https://github.com/pmvc/heroku-config/wiki/Keep-Alive