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Posted by Andy Jeffries on 05/22/06 22:06
On Mon, 22 May 2006 13:47:39 -0500, Alan Little wrote:
>>> In brackets, you only escape the [] characters themselves. Your
>>> expression will allow the \ character in the string.
>>
>> I appreciate your enthusiasm but did you actually test this before
>> trying to correct me ;-)
>
> Yes, I did. However, I checked with ereg(), which does allow the \
> character, given the expression you posted earlier.
Ah, ereg isn't standard, it's PHP dodgy partial regular expression engine.
>> However, you do make the good point that you don't *need* to escape the
>> -, I just do it for readability so there's no mistaking that I meant a
>> literal dash and not part of a range that I forgot to complete.
>
> OK. I don't believe it's standard, however.
AFAIK Perl is the standard for regular expression implementation and:
$ cat test.pl
#!/usr/bin/perl
$string = "\\";
if ($string =~ /[\-]/) {
print "matches\n";
}
else {
print "doesn't match\n";
}
$ ./test.pl
doesn't match
Cheers,
Andy
--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos
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