Php5.4 if ($ a = 'A' & 1) var_dump ($ A); how is the running result of boolean type?

PHP 5.4: {code...} running result: {code...} Q: Why is the result not string & #039; A & #039 ;? Php5.4
This code:

If ($ a = 'A' & 1) var_dump ($ );

Running result:

Bool (true)

Q: Why is the result not string 'A '?

Reply content:

Php5.4
This code:

If ($ a = 'A' & 1) var_dump ($ );

Running result:

Bool (true)

Q: Why is the result not string 'A '?

Because&&Is a logical operator,=Is the value assignment operator. The former has a higher priority than the latter. Do you understand?

&&Symbol must be higher=So the expression is actually like this$ A = ('A' & 1).
Php&&And|Operators return boolean values. UnlikeJs,
In js

('A' & 1) = 1 ('A' | 1) = 'A'

This is the result for the landlord and php4.