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# pg_trace

(PHP 4 )

pg_trace -- Trace a connection to PostgreSQL server

## Beschreibung

``bool pg_trace` (string filename [, string mode [, int connection]])`

Enables tracing of the PostgreSQL frontend/backend communication to a debugging file. To fully understand the results one needs to be familiar with the internals of PostgreSQL communication protocol. For those who are not, it can still be useful for tracing errors in queries sent to the server, you could do for example 'grep '^To backend' trace.log' and see what queriew actually were sent to the PostgreSQL server.

`filename` and `mode` are the same as in fopen() (`mode` defaults to 'w'), `connection` specifies the connection to trace and defaults to the last one opened.

Returns `TRUE` if `filename` could be opened for logging, `FALSE` otherwise.

Siehe auch fopen() and pg_untrace().

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