apache - Varnish POST cache not working though PHP CURL, however, it seems to be working with TERMINAL CURL

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Solution:

I notice a discrepancy between the POST data on the command line and the data in the PHP script.

The --data '{"maxresults":2000}' in your cURL request will actually send a JSON object as payload.

When I look at your PHP script, $data['maxresults'] = 2000; is just regular POST data, which is not the same.

Because you perform a bodyaccess.hash_req_body(); in vcl_hash, the lookup hash will be different if the POST body is different. That's why you'll get a miss in your script.

JSON payload

If you want the same result, I'd advise you to set the POST fields as follows:

curl_setopt($s,CURLOPT_POSTFIELDS,json_encode($data));

Regular POST fields

If you want to use regular POST fields instead, you can perform the following cURL call on the command line:

curl --data 'maxresults=2000' http://localhost/varnishoutput/varnishtest.php

And this is the change you need to make in your PHP file if you want to use pure POST fields:

curl_setopt($s,CURLOPT_POSTFIELDS,http_build_query($data));