Ternary operator

Question

consider code bellow:
$var =true? '1' : false? '2': '3'
Why the Value of $var is '2' and we have the true value '1'?
second:
$var =true? '1' : false? '2': '3'
$var =true? '1' : true? '2': '3'
$var =false? '1' : false? '2': '3'
$var =false? '1' : true? '2': '3'
in all cases the value of $var is '2'

Please let me know understand the main idea behind ternary in php.
Regard

Answer 1

I think order precedence comes into play and '1' replaces true which returns '2'.
Since false will not be evaluated.
Looks like a language bug but i doubt its.

#HappyCoding

Answer 2

david chongo Daljeet Singh Jayden LeCorps Samuel Kinuthia Rajesh Toadie Manjunath Shekar Mozhda Arvin Frozen. BlackRose Mike

Answer 3

it may sound crazy, but ternary in php is left-associative
here's the proof https://www.php.net/manual/en/language.operators.precedence.php

so
true?'1':false?'2':'3'
will become
'1'?'2':'3'
resulting '2'

true?'1':false will get executed, then the the result is used for the next operation