[sqlite] writing results to file in php

[D.W.]

I want to write results of a query in an ascii file.

In the shell this works:
sqlite> .mode list
sqlite> .separator |
sqlite> .output test_file_1.txt
sqlite> select * from tbl1;
sqlite> .exit

I tried similar querys in php, but without any success.
It seems that Sqlite in php doesn't know the output command. How is the synthax 
in php? Can anybody help me?
Daniel