如何在php中使用preg_match_all函数从peragraph中获取新行？

I have a peragraph with some new lines :

 First line

Second line

Third line

 And this is the last line

I want to get the second line from the above peragraph.

So the result I want should be :

 "Second line"

I have tried the following script with preg_match_all() function but I don't know why it's not working.

 <?php
 $pera="First line

 Second line

 Third line

  And this is the last line";


 preg_match_all("#
+{2}.*+#",$pera,$results);
print_r($results);

Do you have any idea how to get the second line from the paragraph?

Any help is much appriciated.

Thanks!

Only for the purpose demonstrated, explode is really better for performance, but if you do want/have to use regex, don't use preg_match_all. That makes it global but you don't need that so go with preg_match. Then, change the pattern:

{2}.*

This will match the second line including leading newline character.

https://regex101.com/r/jA3dL9/1

If you want to match w/o the newline, use a capturing group:

{2}(.*)

Try with:

$data = array_values(
    array_filter(
        explode("
", $pera) // or just 

    )
);

echo $data[1]; // n°line - 1

Demo: http://3v4l.org/gpgOj

Try this:

$pera="First line

 Second line

 Third line

 And this is the last line";


$results = explode("
", $pera);
print_r($results[2]);