PHP: Use strpos() to iterate through a string

$domain="orbit.mds.rmit.edu.au";

$a=0;

 

while(($b=strpos($domain,".",$a))!== false)

{

  print substr($domain,$a,$b-$a);

  echo "

$a".$a." => "."$b".$b."

";

  $a=$b+1;

}

//Result

orbit

$a0 => $b5
md

$a6 => $b8
rmit

$a9 => $b13
edu

$a14 => $b17