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  1. <?php
  2.  
  3. $str = "abaaksjjkdhaf 29023487 - 1kfksdjf";
  4.  
  5. echo preg_replace('/[^\d-]/i', '', $str);
Success #stdin #stdout 0.01s 82944KB
comments (?)
stdin 
Standard input is empty
stdout 
29023487-1
https://ideone.com/HNlubE
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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