php - How to understand this judgment statement without if

Question

$data ['ToUserName'] == 'gh_3c884a361561' || $this->init_follow ( $data );

Answer 1

$data ['ToUserName'] == 'gh_3c884a361561' is true, take $data ['ToUserName'] = 'gh_3c884a361561' as the result, note the "=", and then discard $this->init_follow ( $data )

$data ['ToUserName'] == 'gh_3c884a361561' is false, discard $data ['ToUserName']== 'gh_3c884a361561', and then judge $this->init_follow ( $data ), if this is true, then Get the result returned by the init_follow() function

Answer 2

if($data ['ToUserName'] != 'gh_3c884a361561') {
    $this->init_follow ( $data );
}

Answer 3

||具有短路性。||If the previous statement is true, then the following statement will not be executed.

Answer 4

Short circuit AND and logical AND

Answer 5

Simplified writing method, compared to traditional if, only one line of code is needed

//传统if写法：
if($data ['ToUserName'] != 'gh_3c884a361561') {
    $this->init_follow($data);
}

//推荐使用AND和OR来代替&&和||，AND和OR优先级更低，避免出现优先级问题
$data['ToUserName'] == 'gh_3c884a361561' OR $this->init_follow($data);

//比如一个优先级导致的问题
$result = true && false;//$result为false
$result = true AND false;//$result为true