Preg_match dd-mm-yyyy

I have this code below which checks the date format dd/mm/yyyy

But i need it to check it like dd-mm-yyyy

Question: What is the correct preg_match that can check this dd-mm-yyyy not dd/mm/yyyy

PHP Code:

if ($this->input->post('dob')) 
{

if (1 !== preg_match('/(0[1-9]|1[0-9]|2[0-9]|3(0|1))\/(0[1-9]|1[0-2])\/\d{4}/', $this->input->post('dob'))) 
{
$this->error['dob'] = 'Date needs to have a valid date format - dd-mm-yyyy';
}

} 


There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!