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  1. <?php
  2.  
  3. $pattern = '/^[0-9]{2}$/';
  4. $input = '00';
  5. if (preg_match($pattern, $input, $matches)){
  6.     echo 'Đây số có 2 chữ số';
  7. }
Success #stdin #stdout 0s 82944KB
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stdin
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Standard input is empty
stdout
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Đây số có 2 chữ số
https://ideone.com/2TOttf
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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