Regular expression to match HTML <p> tag using PHP

Question

I have content like this

<p>some content, paragraph 1</p> <p>some content, paragraph 2</p> <p>some content, paragraph 3</p> 

I would like to return the first paragraph ie

 <p>some content, paragraph 1</p> 

Can someone help me with regex code?
'<p>(.*.)</p>' doesn't seem to work

Answer 1

you can do it like this:

 if (preg_match('%(<p[^>]*>.*?</p>)%i', $subject, $regs)) { $result = $regs[1]; } else { $result = ""; } 

You check your string for regular expression, if there is any match, you get the first and only the first, if not. $ result will be an empty string.

If you need to get more than the first result, you can iterate over the $ regs array. And you need to find any other tag that changes the regular expresión to process it, for example, to find the IMAGE tags that you use:

 (<img[^>]*>.*?</img>) 

EDIT: If you process line by line (only with the tag you are looking for), you can put ^ ... $ around the expression to match the complete line, for example:

 if (preg_match('%^(<p[^>]*>.*?</p>)$%im', $subject, $regs)) { $result = $regs[1]; } else { $result = ""; } 

Hth, Regards.

Answer 2

Preventing the inclusion of the <pre> tag, may use:

 if (preg_match('/(<p(>|\s+[^>]*>).*?<\/p>)/i', $subject, $regs)) { $result = $regs[1]; } else { $result = ""; } 

Answer 3

  if (preg_match("/\b1\b/i", "some content, paragraph 1")) { echo "A match was found."; } else { echo "A match was not found."; } 

Where 1 is an agreed term ...

Is that any help?