Operator precedence

gistfile1.php

<?php
	$x = 10; 
	echo $x > 5 ? "1" : false ? "2" : "3";
//           ================================   =>                    = echo construct expression
//                                +     +       => o1                 = ternary operator at root
//           --------------------               => o1.x1              = first operand of o1
//                  +     +                     => o1.x1.o1           = ternary operator at root of o1.x1
//           ------                             => o1.x1.o1.x1        = first operand of o1.x1.o1
//              +                               => o1.x1.o1.x1.o1     = binary operator at root of o1.x1.o1.x1
//           ==                                 => o1.x1.o1.x1.o1.x1  = first operand of o1.x1.o1.x1.o1          = 10
//                =                             => o1.x1.o1.x1.o1.x2  = second operand of o1.x1.o1.x1.o1         = 5
//           ======                             => o1.x1.o1.x1        = first operand of o1.x1.o1                = TRUE
//                    ===                       => o1.x1.o1.x2        = second operand of o1.x1.o1               = "1"
//                          *****               => o1.x1.o1.x3        = third operand of o1.x1.o1 is omitted 
//           ====================               => o1.x1              = evaluate first operand of o1             = TRUE
//                                  ===         => o1.x2              = evaluate second operand of o1            = "2"
//                                        ***   => o1.x3              = third operand of o1 is omitted
//           ================================   =>                    = evaluate echo construct expression       = "2"