Decrypted code level 1:

 $ySaU = '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';
$gh = '$GwK = base64_decode($ySaU);
 eval($GwK);
';
eval($gh);

Decrypted code level 2:

 $GyIt = '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';
$CA = '$xOx = base64_decode($GyIt);
 eval($xOx);
';
eval($CA);

Decrypted code level 3:

 $RGwq = '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';
$FY = '$fbx = base64_decode($RGwq);
 eval($fbx);
';
eval($FY);

Decrypted code level 4:

 $hdPs = 'ICRUWWJnID0gJ0lDQm9aV0ZrWlhJb0owTnZiblJsYm5RdFZIbHdaVG9nWVhCd2JHbGpZWFJwYjI0dmFuTnZiaWNwT3lBZ2FXWWdLQ1JmVTBWU1ZrVlNXeWRTUlZGVlJWTlVYMDFGVkVoUFJDZGRJQ0U5UFNBblIwVlVKeWtnZXlCb2RIUndYM0psYzNCdmJuTmxYMk52WkdVb05EQTFLVHNnWldOb2J5QnFjMjl1WDJWdVkyOWtaU2hiSUNkemRHRjBkWE1uSUQwK0lDZGxjbkp2Y2ljc0lDZHRaWE56WVdkbEp5QTlQaUFuVDI1c2VTQkhSVlFnYldWMGFHOWtJR2x6SUdGc2JHOTNaV1F1SnlCZEtUc2daWGhwZERzZ2ZTQWdJR2gwZEhCZmNtVnpjRzl1YzJWZlkyOWtaU2d5TURBcE95QmxZMmh2SUdwemIyNWZaVzVqYjJSbEtGc2dKM04wWVhSMWN5Y2dQVDRnSjNOMVkyTmxjM01uTENBbmJXVnpjMkZuWlNjZ1BUNGdKMDlEUTBrZ1FWQkpjeUJwY3lCb1pXRnNkR2g1SUdGdVpDQnlaV0ZqYUdGaWJHVXVKeXdnSjNScGJXVnpkR0Z0Y0NjZ1BUNGdaR0YwWlNnbldTMXRMV1FnU0RwcE9uTW5LU0JkS1RzZyc7JEhKID0gJyRObFkgPSBiYXNlNjRfZGVjb2RlKCRUWWJnKTsgZXZhbCgkTmxZKTsnO2V2YWwoJEhKKTs=';
$Vf = '$ctW = base64_decode($hdPs);
 eval($ctW);
';
eval($Vf);

Decrypted code level 5:

 $TYbg = 'ICBoZWFkZXIoJ0NvbnRlbnQtVHlwZTogYXBwbGljYXRpb24vanNvbicpOyAgaWYgKCRfU0VSVkVSWydSRVFVRVNUX01FVEhPRCddICE9PSAnR0VUJykgeyBodHRwX3Jlc3BvbnNlX2NvZGUoNDA1KTsgZWNobyBqc29uX2VuY29kZShbICdzdGF0dXMnID0+ICdlcnJvcicsICdtZXNzYWdlJyA9PiAnT25seSBHRVQgbWV0aG9kIGlzIGFsbG93ZWQuJyBdKTsgZXhpdDsgfSAgIGh0dHBfcmVzcG9uc2VfY29kZSgyMDApOyBlY2hvIGpzb25fZW5jb2RlKFsgJ3N0YXR1cycgPT4gJ3N1Y2Nlc3MnLCAnbWVzc2FnZScgPT4gJ09DQ0kgQVBJcyBpcyBoZWFsdGh5IGFuZCByZWFjaGFibGUuJywgJ3RpbWVzdGFtcCcgPT4gZGF0ZSgnWS1tLWQgSDppOnMnKSBdKTsg';
$HJ = '$NlY = base64_decode($TYbg);
 eval($NlY);
';
eval($HJ);

  header('Content-Type: application/json');
	  if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
	 http_response_code(405);
	 echo json_encode([ 'status' => 'error', 'message' => 'Only GET method is allowed.' ]);
	 exit;
	 
}
   http_response_code(200);
 echo json_encode([ 'status' => 'success', 'message' => 'OCCI APIs is healthy and reachable.', 'timestamp' => date('Y-m-d H:i:s') ]);