Preg_Match For Html Tags

[GD77]

Helllo:

Need to add the html tag <li>...</li> to this plz:

 

preg_match('/^[a-z0-9_\/a\-\ ]+$/si',$va1)

 

Thanks.

[GD77]

ok I m using the following and it s working:

 

preg_match('/^[a-z0-9_\/a\-\<li\>(.*?)<\/li\>\ ]+$/i',$va1)

 

need to escape new line character cause m using a wysiwyg editor on a textarea apparently when i m submiting with new line it returns False...

[jazzman1]

Just add it in your pattern [^\n] or if you have more than one [^\n]+

[GD77]

no not working

[jazzman1]

Could you show us the text that you'd like to validate, also your RegEx string, and finally var_dump($va1).

[jazzman1]

Try,

preg_match('/^[a-z0-9_\/a\-\<li\>(.*?)<\/li\>\ ]+[^\n]?$/i',$va1)

[GD77]

$va1 receiving the data from a textarea the codes till I use new line btw why used ? instead of + in:

+[^\n]?$/i

main code:

if(!preg_match('/^[a-z0-9_\/a\-\<li\>(.*?)<\/li\>\ ]+[^\n\r]+$/i',$va1)){.....}

[Christian F.]

Jazzman: [^\n] matches everything that's not a newline character, exactly the opposite of what GD77 wanted.

 

GD77: Remove the caret from the newline character group, and it should match as you want it to. Here's it a bit cleaned up, and properly escaped for PHP strings too:

'#^[a-z0-9_/a+ -]+<li>(.*?)</li>[\\n\\r]+\\z#i'

Doing this cleanup I found another problem too, namely the fact that you've added the LI tag patter inside the character group. Which caused it to consider the individual characters as part of a group, not as a pattern you wanted matched. I've moved it outside for you, but without any example data I cannot know if this pattern matches what you want.

 

BTW: What's the escaped space after the closing LI-tag?

[jazzman1]

Ah, my apology. You want to match new lines

$pattern = '/^[\n\r]?[a-z0-9_\/a\-\<li\>(.*?)<\/li\>\ ]+/i';
if(preg_match($pattern, $va1)){
echo 'true';
} else {
echo 'false';
}

 

@Christian, you pattern won't work, why are you using [\\n\\r] ?

[GD77]

thx jazzman1 ya it s working.

[GD77]

jazzman1 the code is match < test it their http://erik.eae.net/playground/regexp/regexp.html

even in my php page... if you type <script> or <bi> instead of <li> it returns true

 

[Christian F.]

Unfortunately, the code posted by Jazzman only seems to be working. It has the same issues that I highlighted for your code, due to the grouping of the li-tags inside the square brackets. For all intents and purposes, this is exactly the same:

'#^[\\n\\r]?[\\w?./<>() *-]+#i'

Note that neither period, asterisk, question marks or parenthesis has any special meaning within a character group.

 

Now, if you want help to making something that actually matches what you want it to match, you need to post an example of the source data. As I requested above.

[GD77]

what it should match is any text including new line and li tags simple

ex:

text tetx 1252 ext
text2 text 2 <li>text2</li>
text 3...

[GD77]

only need the <li> might use [li] and i ll substitute i later does not matter just don t want to allow <> for </script> or nothing else to be used

[jazzman1]

If your problem is <some text></some text> tags, just find and replace them in the string with <li> or [li]....

[Christian F.]

In that case I recommend using something like this:

$RegExp = '#((?:[\\w\\r\\n/ -]|<li>.*?</li>)+)#is';

 

This will grab the entire text in your example, and only if you have a balanced pair of li-tags (or none at all).

[GD77]

Christian F. thx a lot mate worked fine

[GD77]

jazzman1 thx too