unusual ternary operation?

Question

I was asked to perform this operation of ternary operator use:

$test='one';
 
 echo $test == 'one' ? 'one' : $test == 'two' ? 'two' : 'three';

Which prints two (checked using php).

I am still not sure about the logic for this. Please, can anybody tell me the logic for this.

Tom H. · Accepted Answer

Because your second option is also a choice, it must be enclosed in parentheses. Thus, your statement

$test='one'; echo $test == 'one' ? 'one' : $test == 'two' ? 'two' : 'three';

needs to be structured like this:

$test='one';

echo $test == 'one' ? 'one' : ($test == 'two' ? 'two' : 'three');

1 Expert Answer