How to post JSON to PHP with curl

Question

I may be way off base  but I ve been trying all afternoon to run the curl post command in this recess PHP framework tutorial   What I don t understand is how is PHP supposed to interpret my POST  it always comes up as an empty array    curl -i -X POST -d    screencast    subject   tools              http   localhost 3570 index php trainingServer screencast json    The slash in there is just to make me not look like an idiot  but I executed this from windows using PHP 5 2  also tried on a Linux server  same version with Linux curl    There must be something I m missing because it seems pretty straightforward  the post just isn t be interpreted right  if it was  everything would work great    This is what I get back    HTTP 1 1 409 Conflict Date  Fri  01 May 2009 22 03 00 GMT Server  Apache 2 2 8  Win32  PHP 5 2 6 X-Powered-By  PHP 5 2 6 Transfer-Encoding  chunked Content-Type  text html  charset iso-8859-1    screencast    id  null  subject  null  body  null            dataUrl  null  dataMedium  null  createdOn  null  author  null

User · Accepted Answer

Jordans analysis of why the   POST-array isn t populated is correct  However  you can use   data   file get contents  php   input      to just retrieve the http body and handle it yourself  See PHP input output streams   From a protocol perspective this is actually more correct  since you re not really processing http multipart form data anyway  Also  use application json as content-type when posting your request

User · Answer

You need to set a few extra flags so that curl sends the data as JSON   command    curl -H  Content-Type  application json           -X POST          -d    JSON    HERE             http   localhost 3000 api url   flags   -H  custom header  next argument is expected to be header -X  custom HTTP verb  next argument is expected to be verb -d  sends the next argument as data in an HTTP POST request   resources   cURL manpage cURL examples

User · Answer

You should escape the quotes like this   curl -i -X POST -d     screencast      subject     tools           http   localhost 3570 index php trainingServer screencast json

User · Answer

Normally the parameter -d is interpreted as form-encoded   You need the -H parameter    curl -v -H  Content-Type  application json  -X POST -d    screencast    subject   tools       http   localhost 3570 index php trainingServer screencast json

User · Answer

I believe you are getting an empty array because PHP is expecting the posted data to be in a Querystring format  key value amp key1 value1    Try changing your curl request to   curl -i -X POST -d  json   screencast    subject   tools              http   localhost 3570 index php trainingServer screencast json   and see if that helps any

[php] How to post JSON to PHP with curl

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