Regular Expressions problem

[tomnie]

Hey,

I am working on a html filter that doesn't allow <span> using strip_tags except for a <span> with the class header. So I thought I replace it with [nom1] and the </span> which ends it with [/nom1]. After that I can strip the <span> tag en replace [nom1] back to what It was. Problem is that I can't find a way to get this replace working correct.

For Example, this replace works as long as there is only 1 <SPAN class="header"> in the content. The problem is that it doesn't stop when encountering the first </SPAN> but continous till the last </SPAN> in the content.

insertText = eregi_replace('<SPAN class=["]header["]>(.*)</SPAN>','[nom1]\1[/nom1]',$insertText);

So when insertText = "<SPAN class=header>content bla something</SPAN> bla bla bla <SPAN class=header> bla again</SPAN> more";

It comes out as:
"[nom1]content bla something</SPAN> bla bla bla <SPAN class=header> bla again[/nom1] more";

So I think I need a replace which says find the span with the class="header" and then move on till It encounters </SPAN>. So:
insertText = eregi_replace('<SPAN class=["]header["]>([^{(</SPAN>)]+)</SPAN>','[nom1]\1[/nom1]',$insertText);}

Where ([^(</SPAN>)]+) is trying to be "is not </SPAN>". 🙁

Does anyone know how to do this correct?

Tomnie 😕

[axo]

if you're only looking for <span class="header"> and the closing </span> you won't need preg_replace.

a simple
$html_string = str_replace('<span class="header">','[nom1]',$html_string);
and
$html_string = str_replace('</span>','[/nom1]',$html_string);

would resolve your problem faster, i think.

[axo]

... here's the code if you want to preg everything...

$find = array(
	"/<span[^>]*>/i",
	"/<\/span>/i",

);

$replace = array(
	"[nom1]",
	"[/nom1]",
);

$html = preg_replace($find,$replace,$html);

[tomnie]

That would work if there are no other spans.

So when insertText = "<SPAN class=header>content bla something</SPAN> bla <SPAN style="color:#000000;">bla</SPAN> bla <SPAN class=header> bla again</SPAN> more <SPAN class="another"> and more </SPAN>";

it would come out as "[nom1]content bla something[/nom1] bla <SPAN style="color:#000000;">bla[/nom1] bla <SPAN class=header> bla again[/nom1] more <SPAN class="another"> and more [/nom1]";

And then finally this code comes out:
"<SPAN class=header>content bla something</SPAN> bla bla</SPAN> bla bla again</SPAN> more and more </SPAN>";

Another thing:

insertText = eregi_replace('<SPAN class=["]header["]>([^{<]*)</SPAN>','[nom1]\1[/nom1]',$insertText);}

Might work if there are no html tags between.

So let me put my question shorter 🙂

[^<] means while is not <.
But ^ only works for a character. And in:
[^</span>] it doesn't work for the whole </span>. How can I do that 😕

[Nehle]

I had this problem as well. I don't know why but I solved it using this code. It does stop at tha first occurence of </span>, not the last

preg_replace("#<span(.+?)>(.+?)</span>#i","\[nom1\]\\2\[/nom1\]",$html);