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Posted by Tom Rogers on 06/15/05 02:40
Hi,
Wednesday, June 15, 2005, 4:42:24 AM, you wrote:
DC> On 6/14/05, Sebastian Mendel <lists@sebastianmendel.de> wrote:
>> Dotan Cohen wrote:
>> > Hi gurus. I'm having fun replacing the text within [ and ] to XML
>> > format on 4000+ files on a windows XP machine. I installed php (and an
>> > apache server) on the machine because it is the only language the I am
>> > remotely familiar with.
>> >
>> > I want and text that is with [ and ] to be enclosed with <note> and
>> > </note>. Going through the archives I found this nice regex (I changed
>> > it a bit- I hope that I didn't break anything important) that fits
>> > into str_replace:
>> >
>> > str_replace("/[([a-zA-Z]+?)]/", "<note>".$what
>> > was_inside_the_parethesis."</note>", $string);
>>
>> str_replace doesnt support regular expressions
>>
>> http://www.php.net/str_replace
>>
>> what you need is preg_replace()
>>
>> http://www.php.net/preg_replace
>>
>> > But how on sweet mother Earth do I get the $what
>> > was_inside_the_parethesis variable to stick into the note tags? I
>> > tried functions that would remove the [ and ], then do
>> > $new_str="<note>".$what was_inside_the_parethesis."</note>";
>> > and then replace the whole [$what was_inside_the_parethesis] with
>> > $new_str. I did get that far.
>>
>> preg_replace( '/\[([^\]]+)\]/', '<note>\1</note>', $string);
>>
>> > Now the catch! If $what_was_inside_the_parethesis contains the word
>> > 'algebra' then I want nothing returned- in other words [$what
>> > was_inside_the_parethesis] should be cut out and nothing put in it's
>> > place. I added an if function in there that checked the presence of
>> > the word algebra, but it ALWAYS returned blank.
>>
>> preg_replace( '/\[(algebra|([^\]]+))\]/', '<note>\2</note>', $string);
>>
>> just to mention, you need only the second example, the first ist just to
>> explain the step toward the final ocde.
>>
>> Sebastian Mendel
>>
>> www.sebastianmendel.de
>> www.sf.net/projects/phpdatetime | www.sf.net/projects/phptimesheet
>>
DC> Thank you very much Sebatian! I can't believe that you got that out of
DC> one line of code! I often feel that i have a lot to learn, but now I
DC> see that I also have a lot to improve...
DC> The code works great for [] tags that do not contain the word algebra.
DC> If the word algebra is alone between the tags then it returns
DC> <note></note>, which I can easily remove with one more line of code.
DC> But if the word algebra appears with another word, then it is
DC> converted to a note just as if it did not contain the word.
DC> I tried adding asterisks and plus-signs at stratigec places within the
DC> regex, but I am not succeeding in getting them to do what I want. I
DC> suppose that I would be overstaying my welcome if I asked just where
DC> to put them?
DC> Dotan
DC> http://lyricslist.com/lyrics/artist_albums/402/pink_floyd.php
DC> Pink Floyd Lyrics
DC> --
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You can use preg_replace_callback to give you a bit more control, so
using Sebastions first expression you could do
function check_string($matches){
if(preg_match('/algebra/i',$matches[0])) return '';
return '<note>'.$matches[0].'</note>';
}
preg_replaec_callback('/\[([^\]]+)\]/','check_string',$string);
--
regards,
Tom
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