ozo,
That worked. Thanks!
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PHP PCRE Regex or str_replace for Hex Characters "0D-0A 0C 0D 0A"
I have hundreds of TXT files, in ASCII format, that have a lots of page-breaks that I want to remove or replace.
When I look at it in Windows Notepad, it just looks like a little vertical rectangle on its own line. As best I can tell from a hex viewer, the hex characters for this page-break are:
0D-0A 0C 0D 0A
I know how to do PCRE regex for a single hex character like
$string = preg_replace('/\x0A/', '\n', $string);
but I would prefer to do a full-replace of the whole page-break code (for example, to replace the whole thing with an empty string).
I don't know how to handle a hyphenated code e.g. "0D-0A" or a whole string of codes like 0D-0A 0C 0D 0A .
And because str_replace is faster than preg_replace, I hope there's a way to do it with str_replace.
Please advise.
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Answers
FrankTech,
If the suggestion above doesn't work or isn't enough could you upload a small sample of the text with those characters. You can zip the file and upload the zip file to www.ee-stuff.com , a site just for EE members. Let me know if you have a question or need more info on this. What is the hex viewer you used?
Most likely you will need to use a PHP function that will support an expression. I don't believe str_replace will.
Let me know if you have any questions or need more information.
b0lsc0tt
b0lsc0tt,
Thanks. I discovered that str_replace _does_ work for single hex characters if I use double quotes, like this:
$text = str_replace("\x0A", "", $text);
OR with combinations of single characters, like this:
$text = str_replace("\x0A\x0C\x0D"
but I couldn't get it to work with the hyphated character \x0A-\x0D . I wish it could, because that would be faster than preg_replace.
Yes, I didn't think of that possibility. That isn't really an expression still but is very helpful to remember. In a string that uses double quotes PHP will understand a number of "special characters." As you found out the \xHH is used for characters with a hex reference. Since the hexadecimal reference only allows 1 or 2 characters the hypenated one would have a problem. I am actually still curious as to what that charact is if it really is a single character. Oh, well. :)
If you are curious there is info on the other characters at http://us.php.net/manual/e
bol
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by: ozoPosted on 2007-11-07 at 15:31:04ID: 20237575
/[\x0A-\x0D]\x0C\x0D\x0A/