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  1. <?php
  2. $arr = ['зеленая бумага 5000 стр., 2 х-сторонняя', 'зеленая бумага 7 000 стр., 2 х-сторонняя', 'зеленая бумага 1 000 000 стр., 2 х-сторонняя'];
  3. foreach($arr as $v) {
  4. 	preg_match('/(?<!\d)\s([\d\s]+)(?=\sстр\.)/', $v, $m);
  5. 	echo $m[1] , PHP_EOL;
  6. }
Success #stdin #stdout 0.03s 52480KB
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5000
7 000
1 000 000
https://ideone.com/jhBqzG
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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