Re: [PHPLIB-DEV] cvs commit From: Massimiliano Masserelli (negro <email protected>)
Date: 10/26/99

On Tue, Oct 26, 1999 at 03:29:59PM +0200, ak <email protected> wrote:

 AK> One (hopefully) final thought for my understanding:
 AK> If you use just one "\", what php does, is, it tries to replace the
 AK> escape sequence "\[" with something else. As "\[" is not a valid
 AK> escape sequence it gives a warning and replaces nothing, so "ereg()"
 AK> sees what it ought to see. If you use "\\[" then "\\" gets replaced
 AK> by "\", the result is "\[" and everything is fine.
 AK> Am I right?

Quite. If a string contains an invalid escape sequence, php3 does not
do anything (apart for the warning). I mean that if you write $a="\[",
$a contains just that: \[.

Try experimenting with printf("\["), printf("\\[") and so on.

Bye. 

--
     Massimiliano Masserelli       |     URL:    http://www.interim.it/
     Internet Images S.r.l.        |     Tel:    +39-051-3390671
     vicolo Viazzolo, 3            |     Fax:    +39-051-557890
     40124 - Bologna - Italy       |
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