write php inside javascript alert

Question

I write PHP inside JS in the following way

alert();

echo__(\"Error-login\") correlates with

Answer 1

Your line becomes

alert(Error-login);

As you can see, you are missing the quotes:

alert('Error-login');

If somebody uses quotes in the translation, this will also generate an error:

alert('Error's are here');

So you need to escape single quotes before you pass it to Javascript.