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  1. <?php
  2.  
  3. $re = '/ip(?:hone|[ao]d) os \K[\d_]+/i';
  4. $str = 'Mozilla/5.0 (iPhone; CPU iPhone OS 11_2_1 like Mac OS X) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0 Mobile/15C153 Safari/604.1';
  5. preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
  6. var_dump($matches[0][0]);
Success #stdin #stdout 0.02s 23916KB
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Standard input is empty
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string(6) "11_2_1"
https://ideone.com/igyK6t
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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