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Top Forums Shell Programming and Scripting Does Sed Search/Replace Work For Multiple Matches On The Same Line? Post 302322195 by cibalo on Wednesday 3rd of June 2009 05:15:07 AM
Old 06-03-2009
Does Sed Search/Replace Work For Multiple Matches On The Same Line?

Hello,

I would like to delete all the footnotes in all my htm files. Hence, I have to delete the whole font tag pairs, i.e. deleting everything between the begin/end font tags.

I create a testfile, of which data parts of all four lines are the same except for the number of font tag pairs, for testing as follows.
# sed -n 'l' testfile
1. The quick brown fox jumps over the lazy dog. -- this is correct li\
ne<br>$
2. The quick<FONT SIZE="1"><SUB>Footnote_1</SUB></FONT> brown fox jum\
ps over the lazy dog. -- 1x FONT Tag Pairs<br>$
3. The quick<FONT SIZE="1"><SUB>Footnote_1</SUB></FONT> brown fox jum\
ps<FONT COLOR="RED"><SUB>Footnote_2</SUB></FONT> over the lazy dog. -\
- 2x FONT Tag Pairs<br>$
4. The quick<FONT SIZE="1"><SUB>Footnote_1</SUB></FONT> brown fox jum\
ps<FONT COLOR="RED"><SUB>Footnote_2</SUB></FONT> over the lazy<FONT F\
ACE="COURIER"><SUB>Footnote_3</SUB></FONT> dog. -- 3x FONT Tag Pairs<\
br>$
#

Then I 'sed' to remove the font tag pairs as follows.
# sed -e 's/<FONT.*<\/FONT>//g' file4
1. The quick brown fox jumps over the lazy dog. -- this is correct line<br>
2. The quick brown fox jumps over the lazy dog. -- 1x FONT Tag Pairs<br>
3. The quick over the lazy dog. -- 2x FONT Tag Pairs<br>
4. The quick dog. -- 3x FONT Tag Pairs<br>
#

The above sed script works only for the line containing only 1x font tag pairs. It looks to me that sed only finds the longest match on the line. For the lines containing more than one font tag pairs, my sed script doesn't work. It deletes some useful data on the line. What am I missing?

Please help!!!

Thank you very much for your assistance.

Best Regards,
cibalo
 

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WORDWRAP(3)								 1							       WORDWRAP(3)

wordwrap - Wraps a string to a given number of characters

SYNOPSIS
string wordwrap (string $str, [int $width = 75], [string $break = "0], [bool $cut = false]) DESCRIPTION
Wraps a string to a given number of characters using a string break character. PARAMETERS
o $str - The input string. o $width - The number of characters at which the string will be wrapped. o $break - The line is broken using the optional $break parameter. o $cut - If the $cut is set to TRUE, the string is always wrapped at or before the specified $width. So if you have a word that is larger than the given width, it is broken apart. (See second example). When FALSE the function does not split the word even if the $width is smaller than the word width. RETURN VALUES
Returns the given string wrapped at the specified length. EXAMPLES
Example #1 wordwrap(3) example <?php $text = "The quick brown fox jumped over the lazy dog."; $newtext = wordwrap($text, 20, "<br /> "); echo $newtext; ?> The above example will output: The quick brown fox<br /> jumped over the lazy<br /> dog. Example #2 wordwrap(3) example <?php $text = "A very long woooooooooooord."; $newtext = wordwrap($text, 8, " ", true); echo "$newtext "; ?> The above example will output: A very long wooooooo ooooord. Example #3 wordwrap(3) example <?php $text = "A very long woooooooooooooooooord. and something"; $newtext = wordwrap($text, 8, " ", false); echo "$newtext "; ?> The above example will output: A very long woooooooooooooooooord. and something SEE ALSO
nl2br(3), chunk_split(3). PHP Documentation Group WORDWRAP(3)
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