Which is Faster and better, Switch Case or if else if?
if-statement, performance, php, switch-statement
Solution
Your first example is simply wrong. You need `elseif` instead of just `else`.
If you use `if..elseif...` or `switch` is mainly a matter of preference. The performance is the same.
However, if all your conditions are of the type `x == value` with `x` being the same in every condition, `switch` usually makes sense. I'd also only use `switch` if there are more than e.g. two conditions.
A case where `switch` actually gives you a performance advantage is if the variable part is a function call:
switch(some_func()) {
case 1: ... break;
case 2: ... break;
}
Then `some_func()` is only called once while with
if(some_func() == 1) {}
elseif(some_func() == 2) {}
it would be called twice - including possible side-effects of the function call happening twice. However, you could always use `$res = some_func();` and then use `$res` in your `if` conditions - so you can avoid this problem alltogether.
A case where you cannot use switch at all is when you have more complex conditions - `switch` only works for `x == y` with `y` being a constant value.
Problem
Which is the better and fastest methods : if or switch ? ``` if(x==1){ echo "hi"; } else if (x==2){ echo "bye"; } switch(x){ case 1 ... break; default; } ```