On Sun, August 26, 2007 3:41 pm, Dotan Cohen wrote:
> I have a string with some HTML paragraphs, like so:
> $text="<p>First paragraph</p>\n<p>More text</p>\n<p>Some more
> text</p>\n<p>End of story</p>";
>
> I'd like to add an image before the last paragraph. I know that
> preg_replace can replace only the first n occurrences of a string, but
> how can I replace the _last_ occurrence of a string? My initial idea
> was to do this:
> 1) Count how many times "</p>\n<p>" occurs as $n
> 2) Replace them all with "</p>\n<img src= alt=>\n<p>"
> 3) Replace $n-1 replacements back to "</p>\n<p>"
>
> Is there a cleaner way? Thanks in advance.
If the string really really ENDS on that LAST "</p>", then you can key
off of that:
$story = preg_replace("|(<p>.*</p>\$|Umsi",
"<p>$new_paragraph</p>\n\\1", $story;
You may have to fiddle with the DOT_ALL setting to only match the true
end of string and not just any old "\n" within the string...
http://php.net/pcre
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