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Posted by Rik on 08/23/06 19:56
Mike Collins wrote:
> On Wed, 23 Aug 2006 16:33:35 +0200, "Rik" <luiheidsgoeroe@hotmail.com>
> wrote:
>
>> Mike Collins wrote:
>>> '/<img[^>]*?(alt\s*=\s*[\'"][^\'"]*[\'"])[^>]+>.*/i',
>>> '$1', $row['text']) . ' (<b>IMG ALT</b>)';
>>> }
>>> I do believe the regex looks pretty good. It accounts for single and
>>> double quotes and spaces around the equals. Any other observations?
>>
>>
>> I'm curious what the reason for the last .* is. You want to replace
>> everything up to the end of the line?
>> Also, once it's matched either a single or double quote, best to
>> stick with it offcourse, so alt='15" monitor' works:
>>
>> '/<img #opening tag
>> [^>]*? #random chars within tag up until next match
>> (alt\s*=\s* #start of alt attribute
>> (\'|") #get the quote
>> ([^\2]*) #everything except the used quote
>> \2) #endquote, end of alt-attribute
>> [^>]* #allow for excess chars within the tag (why even
>> match them?)
>>> .*/ix',
>>
>> Grtz,
>
> Very excellent, thank you. You'd think it would be simple to pull the
> alt attribute out of a tag. I suppose in the overall scheme of things
> it's not that great of an acccomplishment but it did require some
> thought.
>
> preg_replace(
> '/<img #comments are cool
> [^>]*?
> (
> alt\s*=\s*
> (\'|") #match the quote
> ([^\2]*?) #get alt content; dont be greedy
> \2 #use matched quote
> )
> .* #chop and toss
> /ix
> ',
> '$1', $row['text']) . ' (<b>IMG ALT</b>)';
>
> The tag below won't ruin my day but the results won't be pretty. Tried
> the m modifier, no dice.
>
> <img src="/img/l_eng.png"
> alt=""
> width="27"
> height="20"
> />
Well, exactly what do you want with alt="", no match, an empty string?
Grtz,
--
Rik Wasmus
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