php5.4 this sentence if ($a = ' a ' &&1) var_dump ($a); How the result of the run is a Boolean type

Version php5.4
This piece of code:

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

Operation Result:

bool(true)

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

Reply content:

Version php5.4
This piece of code:

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

Operation Result:

bool(true)

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

Because && it is a logical operator, = it is the assignment operator, which has a higher precedence than the latter. Do you understand?

&&The symbol has a finite level = of precedence, so the expression is actually this way $a = ('A' && 1) .
Both the && and || operators in PHP return a Boolean value. Not like js ,
In JS

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

Well, landlord, PHP4 is the result

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