Regex to find text that are not surround by p tag in a article and give the text surround p tag.How to do it?

Question

I have a article which has content on it . I want to find the unwrapped text(which are not surround by any tags) and then surround it by p tag.
code are given below-

<p>line 1 </p>

line 2 unwrapped

<p> line 3 </p>

line 4 unwrapped

<p> line 5 </p>

line 6 unwrapped

But i want the output like this-

<p>line 1 </p>

<p>line 2 unwrapped</p>

<p> line 3 </p>

<p>line 4 unwrapped</p>

<p> line 5 </p>

<p>line 6 unwrapped</p>

Thanks in advance

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Answer 1

You shouldn't parse HTML with regex.
But in case you absolutely want to, here is one.

The following regex will select lines that doesn't use tags as stated:

^(?!<p>).*(?!<\/p>)

You can the replace the match with:

<p>$0</p>

See the regex demo

Here is an example:

$re = '/^(?!<p>).*(?!<\/p>)/m';
$str = '<p>line 1 </p>
line 2 unwrapped
<p> line 3 </p>
line 4 unwrapped
<p> line 5 </p>
line 6 unwrapped';
$subst = '<p>$0</p>';

$result = preg_replace($re, $subst, $str);

Regex to find text that are not surround by p tag in a article and give the text surround p tag.How to do it?

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