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Codeigniter Numeric Dash Validation

/ Published in: PHP
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run as callback from form_validation->setrules
ex:
$this->form_validation->set_rules('cc_number','Credit Card #','required|max_length[20]|callback_alpha_dash_space');

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  1. function alpha_dash_space($str)
  2. 	{
  3.             if (! preg_match("/^([-0-9])+$/i", $str))
  4.             {
  5.                 $this->form_validation->set_message('alpha_dash_space', 'The %s field may only contain numeric characters and dashes.');
  6.                 return FALSE;
  7.             }
  8.             else
  9.             {
  10.                 return TRUE;
  11.             }
  12. 	}

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