PHP goto control structure infinite execution

Question

This seems to execute like an infinite loop.

a:
    echo "Statement 1 \n";
b:
    echo "Statement 2 \n";
if(1 > 2)
    goto a;
else
    goto b;

But this works correctly.

if(1 > 2)
    goto a;
else
    goto b;
a:
    echo "Statement 1 \n";
b:
    echo "Statement 2 \n";

What makes the difference.How can i execute some block of code again like in the first case.Example

$b = 1;
$c = 2;
$a = $b+$c;

if($a > $ b)
  // here i want to cal $a = $b+$c; without using function or copy pasting the code.

Answer 1

It is an infinite loop because... your code is an infinite loop!

    a:
        echo "...";
.-- b: <------------.
|       echo "..."; |
|   if(1 > 2)       |
|       goto a;     |
|   else            |
`-----> goto b; ----´

It will output:

Statement 1
Statement 2
Statement 2
Statement 2
Statement 2
[...]

Named sections of code (a: and b:) do not stop the script; they are just names that you can jump to. Named sections of code will always be executed if reached.