inserting code inside string, preg_replace help.

[Juha Suni]

Hi!

I have managed to live without using too much regular expressions so
far, and now that I need one, I need some help too.

I have a string containing a (possibly large) block of html. I need to
insert code (an image to be precise) right after the last textual
character in the string. This is, of course, no problem if the end
contains plain text and no html. If the string ends in HTML however, I
need to fiddle around. for example consider that the string ends like
"... lorem ipsum.</p></blockquote>". I need to insert code between
"ipsum." and "</p>".

So what kind of regular expression I need, or is there another way I
have missed, to insert code into the string, right after the last
visible character, but before the possibly following html tags (usually
ending tags such as the mentioned </p> and </blockquote>).

Thank you in advance.

--
Suni

[James]

Re: inserting code inside string, preg_replace help.

$replacement = "\${1}you_code_ here\${2}\${3}" ;
$newStr = preg_replace("/(.*?)(\<\/)(.*)/", $replacement, $str)

a bit of a guess I'm afraid

"Juha Suni" <juha.suni@ilmi antajat.fi> wrote in message
news:3fe30c76$0 $7230$39db0f71@ news.song.fi...[color=blue]
> Hi!
>
> I have managed to live without using too much regular expressions so
> far, and now that I need one, I need some help too.
>
> I have a string containing a (possibly large) block of html. I need to
> insert code (an image to be precise) right after the last textual
> character in the string. This is, of course, no problem if the end
> contains plain text and no html. If the string ends in HTML however, I
> need to fiddle around. for example consider that the string ends like
> "... lorem ipsum.</p></blockquote>". I need to insert code between
> "ipsum." and "</p>".
>
> So what kind of regular expression I need, or is there another way I
> have missed, to insert code into the string, right after the last
> visible character, but before the possibly following html tags (usually
> ending tags such as the mentioned </p> and </blockquote>).
>
> Thank you in advance.
>
> --
> Suni
>[/color]

[Rahul Anand]

Re: inserting code inside string, preg_replace help.

Hi Juha, James

I tested the regular expression written by James and found it
incorrect. This expression inserts the repalcement code before all
instances of <\.

The correct one is as follows:

$replacement = "\$1you_code_he re\$2\$3";
$newStr = preg_replace("/(.*)(\<\/)(.*)$/s", $replacement, $str);

-- Rahul

"James" <jgauld@blueyon der.co.uk> wrote in message news:<mqIEb.723 5$C71.1707@news-binary.blueyond er.co.uk>...[color=blue]
> $replacement = "\${1}you_code_ here\${2}\${3}" ;
> $newStr = preg_replace("/(.*?)(\<\/)(.*)/", $replacement, $str)
>
> a bit of a guess I'm afraid
>
> "Juha Suni" <juha.suni@ilmi antajat.fi> wrote in message
> news:3fe30c76$0 $7230$39db0f71@ news.song.fi...[color=green]
> > Hi!
> >
> > I have managed to live without using too much regular expressions so
> > far, and now that I need one, I need some help too.
> >
> > I have a string containing a (possibly large) block of html. I need to
> > insert code (an image to be precise) right after the last textual
> > character in the string. This is, of course, no problem if the end
> > contains plain text and no html. If the string ends in HTML however, I
> > need to fiddle around. for example consider that the string ends like
> > "... lorem ipsum.</p></blockquote>". I need to insert code between
> > "ipsum." and "</p>".
> >
> > So what kind of regular expression I need, or is there another way I
> > have missed, to insert code into the string, right after the last
> > visible character, but before the possibly following html tags (usually
> > ending tags such as the mentioned </p> and </blockquote>).
> >
> > Thank you in advance.
> >
> > --
> > Suni
> >[/color][/color]

[Juha Suni]

Re: inserting code inside string, preg_replace help.

Thanks for the tips.

Rahul Anand wrote:[color=blue]
> The correct one is as follows:
>
> $replacement = "\$1you_code_he re\$2\$3";
> $newStr = preg_replace("/(.*)(\<\/)(.*)$/s", $replacement, $str);[/color]

Actually this does not work as I wished either. This works fine if the
textblock ends in a single closing html tag, but does not work correctly
if there are several:

string "..lorem ipsum dolor</p></blockquote>"
becomes "..lorem ipsum dolor</p>you_code_here </blockquote>"
whereas it should become "..lorem ipsum
doloryou_code_h ere</p></blockquote>"

So I finally dug my head deeper into regexp and found the solution:

$replacement = 'mycodehere' . "\$0";
$newStr = preg_replace("/(\<\/\w*\>)*$/s", $replacement, $str, 1);

I am using the code to insert a small nice graphic image after the last
word in the document, often seen in magazines marking the end of the
article. The actual content comes from a CMS.

--
Suni