How to do unfolding RFC 822
문제
I am trying to write a vCard Parser and am having trouble unfolding lines. As you can see here: http://www.faqs.org/rfcs/rfc822.html look for "unfolding" it says that all the following are valid:
Long string<return>
<tab>continue
Long string<return>
<tab>(n*<tab>)continue
Long string<return>
<space>continue
Long string<return>
<space>(n*<space>)continue
How do I unfold this? Is there a regex for this? I am using PHP if a class has been written I will use that :)
해결책
You could use this to remove those foldings:
$output = preg_replace('/\r\n(?:[ \t]+)/', '', $input);
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