boolean - Difference between or and xor -

my question operator related. today studied operators. having confusion. in php difference between "or" , "xor". know both of them related boolean expression. can't find original difference.

anyone please understand more clearly.

it has mutual exclusion. xor exclusive. or inclusive.

truth table comparison

$x $y ($x or $y) ($x xor $y) 0  0    0          0 1  0    1          1 0  1    1          1 1  1    1          0 

note: difference in last case. xor true when either $x or $y true, not both (as case or).