php - 使用 if 和 else 时 AND 运算符的否定是什么？

Question

我将 if 与 && 一起使用，else 紧随其后。

示例:

$Name = "john";
$age = "30";

如果我这样做:

if($Name =="john" && $age=="30") 
{ some stuff }
else { do other stuff }

这里的其他意思是:$Name !="john"&& $age != "30" ??我对此有点困惑。

谢谢

Answer 1

$Name == "john";
$age == "30";

if($Name =="john" && $age=="30") 
{
   // Here comes only when name is john and age is 30
}
else 
{ 
  // Here comes all the time when name is not john AND age is not 30
  // If age is 30 and name is not John then comes here
  // If age is not 30 and name is John then comes here
}