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<?php $headers = getallheaders(); while (list ($header, $value) = each ($headers)) { echo "$header: $value\n"; } ?>
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function getallheaders() in /in/fYPXJ:2 Stack trace: #0 {main} thrown in /in/fYPXJ on line 2
Process exited with code 255.

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