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[quote=JamesD]
I can find no error in the code.  Here is my test.  If any of the three iterations is true the answer is 3 else the answer is 4.  I tested with $b and $c equal and unequal.

[code]
$b = 1; 
$c = 2; 
$d = 3; 
$x = 4 ;

#<<<--- this, doesn't work
$a = $b != $c ? $d : $b != $c ? $d : $b != $c ? $d : $x;
#when b&c are 1 a equal 4 %%% 1st false 2nd false 3rd false
#when b=1 and c=2 a equal 3 %%% 1st true
 alert($a, "first value of $a");
 
#<<<--- this works
$a = $b != $c ? $d : $b == $c ? $d : $b == $c ? $d : $x;
#when b&c are 1 a equal 3  %%% 1st false 2nd true
#when b=1 and c=2 a equal 3  %%%  1st true
  alert($a, "second value of $a");
  
#<<<--- this works
$a = $b == $c ? $d : $b != $c ? $d : $b == $c ? $d : $x;
#when b&c are 1 a equal 3  %%%  1st true 
#when b=1 and c=2 a equal 3 %%%  1st false 2nd true
 alert($a, "third value of $a");
 
#<<<--- this of course works
$a = $b == $c ? $d : $b == $c ? $d : $b == $c ? $d : $x;
#when b&c are 1 a equal 3  %%% 1st true
#when b=1 and c=2 a equal 4 %%%  1st false 2nd false 3rd false
 alert($a, "fourth value of $a");
 
##Are you tried with "()":
$a = ($b != $c) ? $d : ($b != $c) ? $d : ($b != $c) ? $d : $x;
#when b&c are 1 a equal 4  %%% 1st false 2nd false 3rd false
#when b=1 and c=2 a equal 3 %%% 1st true
 alert($a, "fifth value of $a");

[/code][/quote]

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