PHP - 将IF语句放入变量中

Question

I want to place an if statement into a variable in order to reduce the lines of code... for example I want to do this:

$empty = if(empty($_POST['username']) && empty($_POST['password']))
if($empty){ // echo message; 
}
elseif(!$empty){ ///echo message; 
}

Can something like the above be produced? Or am I making things too complex?

Answer 1

只需省略if：

$empty = empty($_POST['username']) && empty($_POST['password']);

Answer 2

You could use the ternary operator

$message = ( empty($_POST['username']) && empty($_POST['password']) ) ? 'empty': 'not empty';
echo $message;

Answer 3

Try this

$empty = (empty($_POST['username']) && empty($_POST['password'])) ? 0 : 1;

if($empty){ // Not empty message here...; 

}
else{ ///Empty message here....; 

}

Answer 4

Use of ternary operator:

echo empty($_POST['username']) && empty($_POST['password']) ? 'empty message' : 'Not empty message';

Rather than getting value of $empty and printing it, you can directly use echo and ternary operator.