Add tags to ascii paragraphs

retrotron

I need to add ... tags around user-input if they did not include the paragraph tags themselves.

The problem is that the user might put some tags in there, or they might use some other XML tags. I need to insert ... tags only if the user has a text paragraph(s) with no tags at all around it.

ArmyNation_Net

$input = str_replace("", "", "$input");
$input = str_replace("", "", "$input");

echo "$input";

If The Person Uses or Then It Removes Them.
----Therefore, Allowing Your Tags To Be In Place?

That What You Need?

retrotron

That's helpful. I hadn't thought of that approach. Anyways, it's not quite what I need.

The user can input any sort of xml (namespaced or not), any document structure, with multiple paragraphs.

For example, the user might enter this:

Here is one paragraph.

<html:p>Here is another paragraph.</html:p>

Here is another paragraph.

<para>Here is another paragraph.</para>

<docbook:para>Here is another paragraph.</docbook:para>

The user can use any xml tag they like. I don't need to remove the xml tags (an xslt stylsheet transforms them to html already). I only need to add tags around paragraphs which have no tags at all. So in the above example, I only need to add tags to the third paragraph and leave the rest alone.

ArmyNation_Net

http://www.php.net/preg_match

$lookfor = array("<p>", "</p>", "<html:p>", "</html:p>")
//Add All The ones You Want.

if(!preg_match($lookfor, $user_input))
{
echo "<p>$user_input</p>";
}
else
{
echo "$user_input";
}

If Its Like A Forum, Use nl2br("$user_input");

retrotron

Yeah, preg_match and preg_replace is what I've been playing with, but no luck.

I would need to use preg_match_all so I could go through the whole string, since preg_match will only return the first match it finds, and I would need to replace every case in the user input.

Also, wouldn't your code here just put a single tag around the whole user input? So if $user_input was this


<para>Here is one paragraph.</para>

Here is another paragraph.

<p>Here is another paragraph.</p>

I'd get this output:


<p>

  <para>Here is one paragraph.</para>

  Here is another paragraph.

  <p>Here is another paragraph.</p>

</p>

How would I just insert the tags around 'Here is another paragraph'?

Additionally, I don't know the tags the user might use, so I can't search for a definitive list. They might use any xml tag whatsoever. I figure the approach will have to be this: I need to find paragraphs that have no tags.

I imagine the steps to finding the right paragraph are this:

Find any text that has either a) two newlines before it; or b) a void in the character before it (in the case that the text is at the beginning of the document).
Check if that text has either (a) two newlines after it; or (b) a void in the character after it (in the case that the text ends the document); or (c) a single newline character followed by a void (in the case that there is one newline before the end of the document).
Check if that text does not begin with (regular expression) /<.?>/ and does not end with /</.?>/.
If there are any matches to those 3 criteria, then add tags.

Ugh, I don't think I know how to do that. I feel like I'm making this way too complicated, but the user input can be complicated.

retrotron

One thing I tried earlier was to split the text into an array with "\n\n" as the split point. Then I can add tags and join it all back together.

For example, if the user input is this:


<para>Here is one paragraph.</para>

Here is another paragraph.

<p>Here is another paragraph.</p>

Then I get an array:


Array[0] = "<para>Here is one paragraph.</para>";
Array[1] = "Here is another paragraph.";
Array[2] = "<p>Here is another paragraph.";

But that doesn't work because the user might have more complicated xml in there. For example, the input might be this:


<root>

<para>Here is one paragraph.</para>

Here is another paragraph.

<p>Here is another paragraph.</p>

</root>

If I use the same approach, I get this array:


Array[0] = "<root>";
Array[1] = "<para>Here is one paragraph.</para>";
Array[2] = "Here is another paragraph.";
Array[3] = "<p>Here is another paragraph.";
Array[4] = "</root>";

Hmmm.....

retrotron

I suppose I could just tell the users to use tags for their paragraphs if they want their content paragraphed. I.e. tell them to write good html or else. 🙂