"||" The difference between an "or" in an expression

Example 1
Code:
$a = False | | True
Var_dump ($a);
Output Result: True
Description: "| |" Or, the priority is higher than the "=" equals sign, so the false| is calculated first | True for this expression, the result of the expression is true, and then the result of true is assigned to the variable $ A, and then var_dump ($a) prints the result to true

Example 2
Code:
$b = False or true;
Var_dump ($b);
Output result: false;
Note: "or" or, in this expression, the priority is lower than the "=" equal sign, so the rule is calculated to calculate the $b = False expression First, when the Var_dump ($b) printing, the result is false

"||" The difference between an "or" in an expression