Description:
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Exact PHP version: PHP 7.0.15-0ubuntu0.16.04.4 (this was not selectable in dropdown?)

I'm posting raw JSON data to a webserver that is gzipped. Server code is:

$input_data = json_decode(trim(file_get_contents("compress.zlib://php://input")), true);

which should read whatever is posted, then deflate it and then turn it in to an object.

This exact code used to work in Ubuntu 14.04 which had PHP 5.x something but now I'm getting:

ERROR - 2017-04-28 13:41:42 --> Severity: Warning  --> file_get_contents(compress.zlib://php://input): failed to open stream: operation failed /srv/www/xxx/xxx.php 51
ERROR - 2017-04-28 13:42:19 --> Severity: Warning  --> file_get_contents(): cannot represent a stream of type Input as a File Descriptor

which points to the line in the beginning of this bug report. Nothing changed in the client but upgrading from 5.x to 7.x broke this.