PHP and fancy boolean -

There are problems with booleans in php, it would be very grateful if someone could explain why not Does

  $ var = "asdas"; // or if this (! Private ($ var) || ($ var &! Var)) {if (! Isset ($ var) || (is_bool ($ var)! = True & amp; Is_bool ($ Var)! = False)) {echo "is not boolean"; } Else {echo "This is a boolean"; }   
 Output is always - & gt; "This is a bullion"  
 Thank you in advance  
 
 Thank you for your help, yes I know what I have done (school boy error).  
  Solution   
  $ var = "asda"; If (! Isset ($ var) || (is_bool ($ var) === false)) {resonant "this is not a boolean"; } Else {resonance is "boolean"; }    
 
 
 The problem is here:  
  (Is_bool ($ Var)! = True & amp; is_bool ($ var)! = False)   
  is_bool ()  either  returns   Code> or  False  so that you are destroying the first  echo .  
 Change your code to:  
  $ Var = "Dadas"; If (isset ($ var) and is_bool ($ var)) {echo "this is a boolean"; } And {resonance is not "boolean"; }