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   $a, $b, $c = 1, 2, 3;

...
    4) 2 gets evaluated
    5) 3 gets evaluated
    6) return 3

    print( 1 ), print(2), print("\n" );

...
    2) print ( 2 ) gets evaluated
    3) print ( "\n" ) gets evaluated
    4) return result of print ("\n")