How to select the whole sentence with the correct occurrence of the regular expression of PHP?

Hello! Tell me how I can select the whole sentence is a regular expression?

Example, here is the text:

Length and width of the magnesium casing of the laptop is equal 320x202 mm. <br><br>
It's almost like a sheet of A4 paper. The thickness of the device does not exceed 14,9 mm. 
It weighs only 880 grams. <br / >


For example nueropathy offer with the entry of"paper". And before you offer does not have to be the tag <br>. Also not the fact that after a point a space.
April 4th 20 at 01:00
2 answers
April 4th 20 at 01:02
/(?:^|\.\s+)(.*?paper.*?\.)\s+/
not roll (( - Marge.Rosenbaum61 commented on April 4th 20 at 01:05
@Marge.Rosenbaum61, very even roll.
https://regex101.com/r/Owabs6/2 - camilla.Mraz39 commented on April 4th 20 at 01:08
April 4th 20 at 01:04
Good evening.
$text = 'the Length and width of the magnesium casing of the laptop is equal 320x202 mm. <br><br>
It's almost like a sheet of A4 paper. The thickness of the device does not exceed 14,9 mm. 
It weighs only 880 grams. <br/>';

preg_match_all('#.*?paper.*?[.?!](?:\s|$)#', $text, $match);
print_r($match);

The result
Array
(
 [0] => Array
(
 [0] => This is almost like a sheet of A4 paper. 
)

)

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