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In fact, the file_put_contents function will not work as you expect because its signature differs from that of the file_get_contents. In addition, it is designed to write data to a file (not required in this case), and the HTTP wrapper only supports reading:

HTTP connections are read-only; writing data or copying files to an HTTP resource is not supported.

https://www.php.net/manual/en/wrappers.http.php

As a result, you will get an error:

Failed to open stream: HTTP wrapper does not support writeable connections

The correct solution: file_get_contents.