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[code]
while (($word = mb_ereg_search_regs()))
{
$text[] = $word[1];
}
[/text]
in this context $text is a string, so you can't assign a string to $text[].
most probably should be $text (without the brackets).

also, few lines later:

$text = array_diff($text, $this->ignore_words);

as $text is not an array, this is clearly a bug.

the first post should have been:

Code: Select all: while (($word = mb_ereg_search_regs())) { $text[] = $word[1]; }

again, no preview in bug tracker...

It changes from a string, to an array. I just forgot to initialize it.

in general, this is not a recommended programming technique.
if $text holds a string when the function is called, and you want to have an array, it is largely preferable to use another variable (say $text_arr or something) to hold the array.
surprising the reader of the function this way may hold some entertainment value, but it's bad for readability and devastating for maintenance.