In PHP or with | | The difference between and and && summary _php skills

There is no difference in itself, habit problems, but sometimes problems involving operator precedence, the results will be different, recorded.
For example:

Copy Code code as follows:

$p = 6 or 0;
Var_dump ($p);//int (6)

$p = 6 | | 0;
Var_dump ($p);//bool (True)

$p = 6 and 0;
Var_dump ($p); Int (6)

$p = 6 && 0;
Var_dump ($p); BOOL (FALSE)

Because assignment operations have higher precedence than and and OR, they are first assigned; ratio && and | | The low, so the logical operation Fuxian execution, the first logical operation, then assigns the value.