Q:

How to end if statement in php

The question is pretty much self-explanatory, I am having trouble how to end if statement in php.
For example,
<?php
if (argument) {
// end if statement
}
else if (different argument) {
// end if statement
}
else if (another different argument) {
// end if statement
}
else {
// do something
}
?>

A:

Consider carefully how an if condition works:
If (boolean condition) Then
    (consequent)
Else
    (alternative)
End If

When an interpreter finds an If, it expects a boolean condition ...
  and evaluates that condition. If the condition is true, the statements
  following the then are executed. Otherwise, the execution continues
  ... After either branch has been executed, control returns to the
  point after the end If.

The if statement will end if none of its conditions evaluate to true or if one of its conditions evaluate to true. The statement(s) associated with the first true condition will evaluate, and the if statement will end.
See Wikipedia's If–then(–else) for more.

