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  1. <?php
  2.  
  3. $tests = array(
  4.    "123456",
  5.    "123456\n",
  6. );
  7.  
  8. foreach($tests AS $test)
  9. {
  10.    $good = preg_match('~^[0-9]+$~', $test);
  11.  
  12.    echo '"', $test, '" ', $good ? 'is' : 'is not', ' good<br />';
  13. }
  14.  
  15. ?>
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