服务器需要PHP严格比较，但不需要在localhost上

Question

I've run across a weird issue with comparison operators.

On my localhost this code runs fine:

$variable = 2;
if($variable == 2){
  echo 'hi';
}
if($variable == '2b'){
  echo 'bye';
}
//returns 'hi'

But on my server, it returns 'bye', unless I use the strict (===) operator.

Is there any way to change this so my server also returns 'hi'?

Answer 1

This is because php try to cast (int) to your string because you compare an int with a string so your if block would be

if($variable == (int) '2b'){

So when casting to it, so (int) '2b' would be only 2. If you use === it works cause of, that is also check if it is the same type.