5. Debugging aids
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## 5. Debugging aids

### 5.1. xmlrpc_debugmsg

`xmlrpc_debugmsg(` | $debugstring`)`; |

`string` | `$debugstring;`

Sends the contents of `$debugstring` in XML comments in the server return payload. If a PHP client has debugging turned on, the user will be able to see server debug information.

Use this function in your methods so you can pass back diagnostic information. It is only available from `xmlrpcs.inc`.

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