troubleshooting Question

PHP: Best practice for validating Option Select

Avatar of trevor1940
trevor1940 asked on
4 Comments2 Solutions139 ViewsLast Modified:
I have a html form with an option select for choosing a country name see sample code bellow

I'm wondering how to validate this part of the form in PHP using filter input

filter_input(INPUT_POST, "Country", FILTER_VALIDATE_INT);

Will detect if no country has been selected because the value is 1
how would I validate a proper 3 figure country code

Is regex the best way or test for string length?  

<div >
 <select name="Country" >
  <option selected value=1>Please select</option>
  <option value="BRA">Brazil</option>
  <option value="NZL">New Zealand</option>
  <option value="SWZ">Switzerland</option>
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