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# apd_set_session_trace

(no version information, might be only in CVS)

apd_set_session_trace -- Starts the session debugging

## Beschreibung

void apd_set_session_trace ( int debug_level [, string dump_directory] )

Starts debugging to `apd_dump_{process_id}` in the dump directory.

## Parameter Liste

`debug_level`

  An integer which is formed by adding together the `XXX_TRACE` constants.

  It is not recommended to use `MEMORY_TRACE`. It is very slow and does not appear to be accurate. `ASSIGNMENT_TRACE` is not implemented yet.

  To turn on all functional traces (TIMING, FUNCTIONS, ARGS SUMMARY (like strace -c)) use the value 99

`dump_directory`

  The directory in which the profile dump file is written. If not set, the apd.dumpdir setting from the `php.ini` file is used.

## Rückgabewerte

Es wird kein Wert zurückgegeben.

## Beispiele

Beispiel 1. apd_set_session_trace() example
`<?php apd_set_session_trace(99); ?>`

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