Strange behavior of ternary operator and string concatenation?

Question

Hi, I'm just wondering why this code produces (at least for me) incorrect results.

Okay, maybe it's my fault

$description = 'Paper: ' . ($paperType == 'bond') ? 'Bond' : 'Other';

I guess, if paperType is equal to "Bond", the description is "Paper: Bond", if paperType is not equal to "Bond", the description is "Paper: Other".

But when I run this code, the result is that the description is "Bond" or "Other" and leaves me Wondering where the string "Paper:" went? ? ?

P粉204079743 · Answer

Related to operator precedence. You must do the following:

$description = 'Paper: ' . (($paperType == 'bond') ? 'Bond' : 'Other');

P粉448130258 · Answer

$description = 'Paper: ' . ($paperType == 'bond' ? 'Bond' : 'Other');

Try adding parentheses so that the string is concatenated to another string in the correct order.