[PHP] regex to remove NL and CR

[Kathleen Ballard]

I am extracting text from a text datatype field of a
database.  The target text is marked (beginning and
end) by html comments that have a known--but not
uniform--format.  Unfortunately, the web-based
interface used to maintain the data inserted hard line
breaks in the text.

I initially tried removing all NL and CR chars from
the string, which has the unanticipated result of
removing some spaces between words that had wrapped in
the admin interface.

Now, I need to remove all NL and CR that occur within
a string starting with !- and ending with -.  I
have no idea where to start, because the NL and CR
could also occur in the strings that mark the start
and end of the comments.

I am very new to regex, but starting to get it.  If
someone could just give me a push in the right
direction.  Nothing I have tested in regex coach comes
close to matching what I need.

Kathleen

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[PHP] regex to remove NL and CR

[Kathleen Ballard]

I am extracting text from a text datatype field of a
database.  The target text is marked (beginning and
end) by html comments that have a known--but not
uniform--format.  Unfortunately, the web-based
interface used to maintain the data inserted hard line
breaks in the text.

I initially tried removing all NL and CR chars from
the string, which has the unanticipated result of
removing some spaces between words that had wrapped in
the admin interface.

Now, I need to remove all NL and CR that occur within
a string starting with !- and ending with -.  I
have no idea where to start, because the NL and CR
could also occur in the strings that mark the start
and end of the comments.

I am very new to regex, but starting to get it.  If
someone could just give me a push in the right
direction.  Nothing I have tested in regex coach comes
close to matching what I need.

Kathleen

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Re: [PHP] regex to remove NL and CR

[Tom Rogers]

Hi,

Wednesday, August 18, 2004, 9:09:02 AM, you wrote:
KB I am extracting text from a text datatype field of a
KB database.  The target text is marked (beginning and
KB end) by html comments that have a known--but not
KB uniform--format.  Unfortunately, the web-based
KB interface used to maintain the data inserted hard line
KB breaks in the text.

KB I initially tried removing all NL and CR chars from
KB the string, which has the unanticipated result of
KB removing some spaces between words that had wrapped in
KB the admin interface.

KB Now, I need to remove all NL and CR that occur within
KB a string starting with !- and ending with -.  I
KB have no idea where to start, because the NL and CR
KB could also occur in the strings that mark the start
KB and end of the comments.

KB I am very new to regex, but starting to get it.  If
KB someone could just give me a push in the right
KB direction.  Nothing I have tested in regex coach comes
KB close to matching what I need.

KB Kathleen


This is probably quicker using a callback function like this:

$string = !-- a\nlong\rtest\n\rstring --;

echo nl2br(htmlentities($string));
echo 'br';

function replace($str){
return preg_replace('/\n\r|\n|\r/',' ',$str[0]);
}

$newstring = preg_replace_callback('/!--(.*?)--/s','replace',$string);

echo nl2br(htmlentities($newstring));

-- 
regards,
Tom

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