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Logical operators
-----
<?php
// boolean ops
$a && $b;
$a || $b;
!$a;
!!$a;
// logical ops
$a and $b;
$a or $b;
$a xor $b;
// precedence
$a && $b || $c && $d;
$a && ($b || $c) && $d;
$a = $b || $c;
$a = $b or $c;
-----
array(
0: Expr_BooleanAnd(
left: Expr_Variable(
name: a
)
right: Expr_Variable(
name: b
)
)
1: Expr_BooleanOr(
left: Expr_Variable(
name: a
)
right: Expr_Variable(
name: b
)
)
2: Expr_BooleanNot(
expr: Expr_Variable(
name: a
)
)
3: Expr_BooleanNot(
expr: Expr_BooleanNot(
expr: Expr_Variable(
name: a
)
)
)
4: Expr_LogicalAnd(
left: Expr_Variable(
name: a
)
right: Expr_Variable(
name: b
)
)
5: Expr_LogicalOr(
left: Expr_Variable(
name: a
)
right: Expr_Variable(
name: b
)
)
6: Expr_LogicalXor(
left: Expr_Variable(
name: a
)
right: Expr_Variable(
name: b
)
)
7: Expr_BooleanOr(
left: Expr_BooleanAnd(
left: Expr_Variable(
name: a
)
right: Expr_Variable(
name: b
)
)
right: Expr_BooleanAnd(
left: Expr_Variable(
name: c
)
right: Expr_Variable(
name: d
)
)
)
8: Expr_BooleanAnd(
left: Expr_BooleanAnd(
left: Expr_Variable(
name: a
)
right: Expr_BooleanOr(
left: Expr_Variable(
name: b
)
right: Expr_Variable(
name: c
)
)
)
right: Expr_Variable(
name: d
)
)
9: Expr_Assign(
var: Expr_Variable(
name: a
)
expr: Expr_BooleanOr(
left: Expr_Variable(
name: b
)
right: Expr_Variable(
name: c
)
)
)
10: Expr_LogicalOr(
left: Expr_Assign(
var: Expr_Variable(
name: a
)
expr: Expr_Variable(
name: b
)
)
right: Expr_Variable(
name: c
)
)
)