Reading from https://wiki.php.net/rfc/shorter_attribute_syntax_change...

6 Candidates (in order of ballot)

💡 Info

Votes 64
Seats 1
Quota floor(64 / (1 + 1)) + 1 = 33

Round #1

Candidate Tally
@@Attr 9
#[Attr] 31
@[Attr] 13
<<Attr>> 6
@:Attr 1
@{Attr} 4

⛔ Eliminated (1 votes)

Round #2

🔀 Transfers

Candidate Tally
@@Attr 10
#[Attr] 31
@[Attr] 13
<<Attr>> 6
@{Attr} 4

⛔ Eliminated (4 votes)

Round #3

🔀 Transfers

Candidate Tally
@@Attr 10
#[Attr] 33
@[Attr] 14
<<Attr>> 7

Why @@ is the best attribute syntax for PHP