$re = '/(?<=Existing Products & Quantity & ID)(.|\n)*(?=CURRENT)/m';
$str = 'B) For Insert and Modify : Modify Information of Products
(Must check and verify)
Existing Products & Quantity & ID
(1) Jeans 75 J73820
(2) Shirts 10 S02932
(3) Bottoms 2 B0239
*Order ID (Customer Purchase): THK78183XL9102
*Item to check: Stock, Brand
*Before and after:
CURRENT
-----------------------------------------------------------------------------
Product ID : J73820
Quantity : 75
Title : Jeans
Brand: XXXX
-----------------------------------------------------------------------------
NEXT ACTION
Increase stock
TO BE
-----------------------------------------------------------------------------
Product ID : J73820
Quantity : 100
Title : Jeans
Brand: XXXX
-----------------------------------------------------------------------------
NEXT ACTION
Add 25 unit';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php