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ID of POST, GET, COOKIE or SESSION - Validation

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  1. $id = abs(intval($id)); // only positiv and complete id's
  2.  
  3. if(!isset($id) or empty($id) or is_array($id)) {
  4. 	return false;
  5. }
  6.  
  7. $id = 3; // return true
  8. $id = [] // return false
  9. $id = '' // return false

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