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  1. <?PHP
  2. # answer: http://o...content-available-to-author-only...e.jp/qa/q7056347.html
  3.  
  4. while ($line = fgets(STDIN)){
  5.     if (preg_match('/\A\d{3}-(?:[A-Z]-)?\d{3}\Z/', $line)){
  6. 	echo $line;
  7.     }
  8. }
  9. ?>
Success #stdin #stdout 0s 13112KB
comments (?)
stdin 
123-456
1234-567
123-4567
1234-5678
123-A-456
123-A456
stdout 
123-456
123-A-456
https://ideone.com/2WChn
language:
PHP (php 7.3.5)
created:
14 years ago
visibility:
secret

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