How to concatenate multiple ternary operator in PHP? [duplicate]

Answer 1

Put parenthesis around each inner ternary operator, this way operator priority is assured:

$bar = ( $foo == 1 ) ? "1" : (( $foo == 2 ) ? "2" : "other");

Answer 2

Just stack up the parenthesis, and you've got it:

$bar = ($foo==1? "1" : ($foo==2? "2" : "other"));

As an aside, if you've got many clauses, you should consider using a switch:

switch ( $bar ) {
  case 1:  echo "1";
  case 2:  echo "2";
  default: echo "other";
}

If the switch gets long, you can wrap it in a function.