simple egrep - regex question

To match "this" or "that" in string $str, I believe I would use this:

eregi("(this|that)", $str)

but what if I want to match "this" AND "that"?

I suppose I could use this:

eregi("this", $str) && eregi("that", $str)

But is there a better way?

deko wrote:
> To match "this" or "that" in string $str, I believe I would use this:
>
> eregi("(this|that)", $str)
>
> but what if I want to match "this" AND "that"?
>
> I suppose I could use this:
>
> eregi("this", $str) && eregi("that", $str)
>
> But is there a better way?

eregi("this.*that|that.*this", $str)


JW

> > eregi("this", $str) && eregi("that", $str)
> >
> > But is there a better way?
>
> eregi("this.*that|that.*this", $str)

Is this saying: match the four letters "this" followed by a period, then
any combinbation of characters, then the four letters "that" (and vice
versa). What does the period do?

deko wrote:
>>>eregi("this", $str) && eregi("that", $str)
>>>
>>>But is there a better way?
>>
>>eregi("this.*that|that.*this", $str)
>
>
> Is this saying: match the four letters "this" followed by a period, then
> any combinbation of characters, then the four letters "that" (and vice
> versa). What does the period do?
>
>

The period stands for 'any character'. So .* stands for: zero or more of
any character.

JP

--
Sorry, <devnull@cauce.org> is een "spam trap".
E-mail adres is <jpk"at"akamail.com>, waarbij "at" = @.

> >>>eregi("this", $str) && eregi("that", $str)
> >>>
> >>>But is there a better way?
> >>
> >>eregi("this.*that|that.*this", $str)
> >
> >
> > Is this saying: match the four letters "this" followed by a period,
then
> > any combinbation of characters, then the four letters "that" (and vice
> > versa). What does the period do?
> >
> >
>
> The period stands for 'any character'. So .* stands for: zero or more of
> any character.

I see. So, "this.*that" can be loosely understood to mean "match this and
that"?

deko wrote:
> I see. So, "this.*that" can be loosely understood to mean "match
> this and that"?

Yep: this anything-in-between-and that


JW

> > I see. So, "this.*that" can be loosely understood to mean "match
> > this and that"?
>
> Yep: this anything-in-between-and that

10-4. Thanks for the help!