[vjsreevs]

1) How do I use the sqlite extension?

SQLite is essentially a simple SQL based database that creates and uses
simple text files, files that the SQLite user creates.

Further : http://www.zend.com/php5/articles/php5-sqlite.php

[vjsreevs]

2) What is the easiest way to write out an array to a file?

using :

$fd = @fopen("output","w") or die ("I/O error");
fwrite($fd,implode("\n",$file));
fclose($fd);

[vjsreevs]

3) What is leak()

A leak allocates a resource and loses all references to it.
it's mostly used for debugging purposes

[vjsreevs]

4) What is fgetss()

Gets line from file pointer and strip HTML tags

Further : http://in2.php.net/manual/en/function.fgetss.php

[vjsreevs]

5) What is clearing the contents of an array?

You may need to clear the contents of an array when reusing the same
variable to hold different array data (say in a loop). If you don't
clear the contents then the contents from the previous loop iteration
may be left in the array (if the previous array data was longer than the
current array data).