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   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  namespace Brick\Math\Exception;
   6  
   7  /**
   8   * Exception thrown when attempting to create a number from a string with an invalid format.
   9   */
  10  class NumberFormatException extends MathException
  11  {
  12      /**
  13       * @param string $char The failing character.
  14       *
  15       * @return NumberFormatException
  16       *
  17       * @psalm-pure
  18       */
  19      public static function charNotInAlphabet(string $char) : self
  20      {
  21          $ord = \ord($char);
  22  
  23          if ($ord < 32 || $ord > 126) {
  24              $char = \strtoupper(\dechex($ord));
  25  
  26              if ($ord < 10) {
  27                  $char = '0' . $char;
  28              }
  29          } else {
  30              $char = '"' . $char . '"';
  31          }
  32  
  33          return new self(sprintf('Char %s is not a valid character in the given alphabet.', $char));
  34      }
  35  }