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  1. <?php
  2.  
  3. $re = '~(?<!\w)\d+(?:\s+\d+)*(?!\w)~'; 
  4. $strs = array("Call us on 0800 2458 452 now!","Call us now on 0800 2458 452"); 
  5. foreach ($strs as $str) {
  6.  echo preg_replace($re, '<b>$0</b>', $str) . PHP_EOL;
  7. }
Success #stdin #stdout 0.02s 52432KB
comments (?)
stdin 
Standard input is empty
stdout 
Call us on <b>0800 2458 452</b> now!
Call us now on <b>0800 2458 452</b>
https://ideone.com/msnSzD
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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