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help with a simple regular expression
Posted: Thu Mar 23, 2006 4:10 am
by jasongr
Hi
I am trying to write a simple regular expression that will help me lookup
all the occurrences of & followed by a-z or A-Z with the following exception;
(case insensitive) should not be matched
so I will be able to find:
&aad
&De
but not:
&&
&NBSp;
any help would be appreciated
Posted: Thu Mar 23, 2006 8:54 am
by mattcooper
This'll help you along...
Code: Select all
$exclude=" ";
$text="&NBSP";
if(eregi($exclude, $text)){ // compare the variables and check for a case-insensetive match
echo "Match";
}
else{
echo "No match";
}
Run it and see what happens; hopefully you'll be able to extrapolate the rest of what you need from there!
Hope this helps.
Posted: Thu Mar 23, 2006 9:10 am
by pickle
Moved to Regex forum.
Try this:
That's a pattern to use with
preg_match(), not
ereg()
Also, take a look at ~ d11wtq's
Regex Advanced Tutorial II. You might find some useful stuff in there.
Posted: Thu Mar 23, 2006 9:50 am
by mattcooper
Am I to take it that, in this instance, I was grossly incorrect?!
Posted: Thu Mar 23, 2006 9:53 am
by pickle
Not at all.
preg_match() uses the PCRE and is often faster than
eregi(). That also means the patterns will look different.
I was just saying that because I saw you're example used
eregi() and I didn't want him trying to use my pattern in
eregi() (as it wouldn't ever work).
Posted: Thu Mar 23, 2006 10:10 am
by mattcooper
Excellent news! I often find myself wanting to further my own understanding of PHP by taking on other developers' problems and have come a-cropper a few times and been, in a manner of speaking, "pulled-up" on it.
It's good to know that I'm not leading someone astray in this instance! Thanks fella...