Re: [PHP] (another) regex difficulty
Am Donnerstag, 02.10.03 um 01:37 Uhr schrieb Cristian Lavaque: doh, I now understand your question, you don't mean the asterisk literally, but as any character that follows a backslash... sorry -_- that's right ;) -- anyway, thanks for your effort! my problem was that i misunderstood the escape-the-meta-char-idea (see below). Am Mittwoch, 01.10.03 um 23:23 Uhr schrieb Curt Zirzow: '\\' always gets translated to '\' So the string: '/(\\)/' translates to '/(\)/' which is an invalid regex, you'll get a complaint about unclosed paren. this is also a bit tricky: echo beg \\ end\n; echo beg \ end\n; c) Why do I hate regular expressions so much? perhaps because you're using them wrong. klugscheisser ;) I've answered all 5 of em so far. thanks, your answers helped a lot! - jns -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] regex/preg_replace() difficulty
Regular Expressions: How can I indicate that the contents of a term
(user input*) needs to be treated as 'non-operators/control characters'
(as *word* to match in that exact way)?
(* Because the term is a user's input I can't escape the control
characters manually.)
Example:
$result =
preg_replace('/('.$termWithOptionalBold.')(\/?span[^]*)*()/si',
'span class=highlight\1/span', $result);
[If $termWithOptionalBold is a . (period) for example, any char will
be matched--instead of only the .]
Any suggestions?
Thanks a lot for your effort!
Best wishes,
jonas
PS: Somewhere I read that '\Q' would do something like that but it
didn't work.
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[PHP] (another) regex difficulty
regular expressions
the example below should turn any character exept \* (*= any char)
into an x:
$term = preg_replace('/[^(\\\)+(.){1}]/', 'x', $term);
but i guess because of the [brackets] the . (period) is treated as
character . instead as metacharacter (that matches any char).
anyone knows how to work around this?
thanks for your effort
best wishes,
jns
ps: thanks for your help, holmes and kilimajer!
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Re: [PHP] (another) regex difficulty
01.10.03 at 18:17 Curt Zirzow wrote:
preg_replace('/(?!\\).{1}/', 'x', $term);
01.10.03 at 18:27 CPT John W. Holmes wrote:
$term = preg_replace('/[^\\]./','x',$term);
they don't work (thanks anyway)
it's pretty simple: i need a regex that matches any character in a
string except \* (* stands for any char that follows the \).
example: this is \ba test
should match: this a is test
isn't there a way to do this?
best wishes,
jns
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[PHP] regex drive me crazy
1. The PHP manual sais to escape the escape char, it has to be written
twice*, but:
$term = preg_replace('/(\\)/', 'backslash $1', $term);
causes an error** while using three backslashes (see 2.) works.
2.1.
$term = beg \ end;
print preg_replace('/(\\\)/', 'backslash $1', $term);
returns: beg backslash \ end
2.2.
$term = beg \\ end;
print preg_replace('/(\\\)/', 'backslash $1', $term);
returns: beg backslash \ end (the same as 2.1.)
2.3.
$term = beg \\\ end;
print preg_replace('/(\\\)/', 'backslash $1', $term);
returns: beg backslash \backslash \ end
Does this make ANY sense?
- jns
* http://www.php.net/manual/en/pcre.pattern.syntax.php
** Warning: Compilation failed: missing ) at offset 3 in
/home/jonas/public_html/test01.php on line 3
Am Mittwoch, 01.10.03 um 19:14 Uhr schrieb CPT John W. Holmes:
Regular expressions are for pattern matching... not matching
everything
BUT a pattern.
good point! ;)
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Re: [PHP] regex drive me crazy
Am Mittwoch, 01.10.03 um 22:27 Uhr schrieb Chris W. Parker:
Seeing as how you haven't had a response yet, I'll ask this: what
exactly is your question? I'm not sure as to what it is that you want.
My question are:
a) Why does the PHP manual say that backslashes get escaped by writing
them twice while this causes an error in my example (see below)?
b) Why does a different input (2.1. and 2.2.) result in the same output
(in the example I enclosed)?
c) Why do I hate regular expressions so much?
Choose one.
- Jns
8
1. The PHP manual sais to escape the escape char, it has to be written
twice*, but:
$term = preg_replace('/(\\)/', 'backslash $1', $term);
causes an error** while using three backslashes (see 2.) works.
2.1.
$term = beg \ end;
print preg_replace('/(\\\)/', 'backslash $1', $term);
returns: beg backslash \ end
2.2.
$term = beg \\ end;
print preg_replace('/(\\\)/', 'backslash $1', $term);
returns: beg backslash \ end (the same as 2.1.)
2.3.
$term = beg \\\ end;
print preg_replace('/(\\\)/', 'backslash $1', $term);
returns: beg backslash \backslash \ end
* http://www.php.net/manual/en/pcre.pattern.syntax.php
** Warning: Compilation failed: missing ) at offset 3 in
/home/jonas/public_html/test01.php on line 3
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[PHP] Re: highlighting multi term search results
Am Montag, 08.09.03 um 04:21 Uhr schrieb Lee O'Mara:
Why not just allow for bold tags in the search term? What I mean is, I
think you can get the results you want by allowing any number of open
or close bold tags between each letter of the search term.
i thought so too (but i had no idea how to code it); this must be a
solution.
i've tested your function like this:
?
function highlight($src_terms, $src_terms_int, $result) {
$i = 0;
while ($i $src_terms_int) {
$termWithOptionalBold = preg_replace('/(.)/', '(\/?b)
*\1',$src_terms[$i]);
$result = preg_replace('/(\/?b)*('.$termWithOptionalBold.')(\/?b)
*/si', 'b\2/b', $result);
$i++;
}
return $result;
}
$search = te est; // user input to search for
$src_terms = explode( , $search);
$src_terms_int = count($src_terms);
$result = this is just a test; // result from database
print highlight($src_terms, $src_terms_int, $result);
?
but it didn't highlight anything.
btw, the bold tag in this example is used to simplify it and stands for
something like span class=highlight/span what makes it even
trickier, i guess.
thanks for your help!
jns
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[PHP] highlighting multi term search results
hi, i'm working on a function that highlights search results. problem:
a search input like te est; two terms that match one word (test).
the mysql query matches entries like this but my function isn't able to
highlight them the right way:
?
function highlight($src_terms, $src_terms_int, $result) {
$i = 0;
while ($i $src_terms_int) {
$result = preg_replace('/('.$src_terms[$i].')/si',
'b'.$src_terms[$i].'/b', $result);
$i++;
}
return $result;
}
$search = te est; // user input to search for
$src_terms = explode( , $search);
$src_terms_int = count($src_terms);
$result = this is just a test; // result from database
print highlight($src_terms, $src_terms_int, $result);
?
output: this is just a bte/bst
(after the first term is highlighted the second one can't be found
anymore.)
someone has an idea how to work around this?
thanks for your effort!
jonas
ps: please also let me know if you know of a website that might help, i
didn't find anything useful. thanks!
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[PHP] Re: highlighting multi term search results
Am Sonntag, 07.09.03 um 14:11 Uhr schrieb Catalin Trifu
[EMAIL PROTECTED]:
Here the $result is changed to 'bte/bst' on the first search.
Obviously on the second replace the term will not be found anymore!
yes, it's obvious.
like i said:
output: this is just a bte/bst
(after the first term is highlighted the second one can't be found
anymore.)
but how to work around it??
- jns
/snip/
hi, i'm working on a function that highlights search results. problem:
a search input like te est; two terms that match one word (test).
the mysql query matches entries like this but my function isn't able
to highlight them the right way:
?
function highlight($src_terms, $src_terms_int, $result) {
$i = 0;
while ($i $src_terms_int) {
$result = preg_replace('/('.$src_terms[$i].')/si',
'b'.$src_terms[$i].'/b', $result);
$i++;
}
return $result;
}
$search = te est; // user input to search for
$src_terms = explode( , $search);
$src_terms_int = count($src_terms);
$result = this is just a test; // result from database
print highlight($src_terms, $src_terms_int, $result);
?
output: this is just a bte/bst
(after the first term is highlighted the second one can't be found
anymore.)
someone has an idea how to work around this?
thanks for your effort!
jonas
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[PHP] Re: highlighting multi term search results
Am Sonntag, 07.09.03 um 21:17 Uhr schrieb John W. Holmes:
output: this is just a bte/bst
(after the first term is highlighted the second one can't be found
anymore.)
but how to work around it??
Highlight the longest words first?
I don't think that would change anything. A search for te est then
highlights test into tbest/b and te can't be found anymore.
thanks anyway!!
j
snip 8
?
function highlight($src_terms, $src_terms_int, $result) {
$i = 0;
while ($i $src_terms_int) {
$result = preg_replace('/('.$src_terms[$i].')/si',
'b'.$src_terms[$i].'/b', $result);
$i++;
}
return $result;
}
$search = te est; // user input to search for
$src_terms = explode( , $search);
$src_terms_int = count($src_terms);
$result = this is just a test; // result from database
print highlight($src_terms, $src_terms_int, $result);
?
output: this is just a bte/bst
(after the first term is highlighted the second one can't be found
anymore.)
someone has an idea how to work around this?
thanks for your effort!
jonas
ps: please also let me know if you know of a website that might help, i
didn't find anything useful. thanks!
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