troubleshooting Question

Replace newlines with HTML paragraph tags

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evcoFlag for United States of America asked on
PHPRegular Expressions
13 Comments1 Solution938 ViewsLast Modified:
The following replaces 2 or more newlines with paragraph tags however if a paragraph (2 or more newlines) contains a single newline it is not wrapped in paragraph tags.

I have a basic understanding of regular expressions but I'm at a loss on how to fix the regex below to correct problem.

I've figured out that it DOES work when newlines are \r but not when they are \r\n or \n.

The example below will output:
<p>This is the first paragraph.</p>
This is the second

But I need it to output::
<p>This is the first paragraph.</p>
<p>This is the second
$string = "This is the first paragraph.\n\nThis is the second\nparagraph.";
echo preg_replace("{(?:^|(?:\x0d\x0a){2,}|\x0a{2,}¦\x0d{2,})(.+?)(?=(?:(\x0d\x0a){2,}|\x0d{2,}|\x0a{2,}|$))}", "</p>$1<p>", $string)
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