只有变量应该通过引用传递..需要一些帮助:)（PHP）

Here is what it's saying:

Notice: Only variables should be passed by reference in C:\xampp\htdocs\loginegister.php on line 20

In line 20, I have

$stmt->bindParam(':password', password_hash($_POST['password'], PASSWORD_BCRYPT));

Can someone help me out?

Store value of hash in a variable and then pass it.

$password = password_hash($_POST['password'], PASSWORD_BCRYPT);
$stmt->bindParam(':password', $password);

For more reference: http://php.net/manual/en/pdostatement.bindparam.php

Avoid function call in Statement#bindParam, its return value cannot be passed as reference.

Try to separate the function call: $pwd = password_hash($_POST['password'], PASSWORD_BCRYPT); $stmt->bindParam(':password', $pwd);

More info on passing values by reference: http://php.net/manual/en/language.references.pass.php

The second parameter of bindParam is a variable reference. Since a function return cannot be referenced, it fails to strictly meet the needs of the bindParam parameter.

   $password = password_hash($_POST['password'], PASSWORD_BCRYPT);
   $stmt->bindParam(':password', $password);

You must first Store the value of password_hash($_POST['password'] in a variable ($pwd) and then pass it

$pwd = password_hash($_POST['password'], PASSWORD_BCRYPT);
$stmt->bindParam(':password', $pwd);

Yes, it works

It is part of PHP Regiter, Login, Logout script available at following link: https://github.com/thedevdojo/php-login-script