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Precedence of concatenation in PHP 7 and PHP 8
-----
<?php
1 + 2 . 3 + 4;
1 << 2 . 3 << 4;
-----
!!version=8.0
array(
0: Stmt_Expression(
expr: Expr_BinaryOp_Concat(
left: Expr_BinaryOp_Plus(
left: Scalar_Int(
value: 1
)
right: Scalar_Int(
value: 2
)
)
right: Expr_BinaryOp_Plus(
left: Scalar_Int(
value: 3
)
right: Scalar_Int(
value: 4
)
)
)
)
1: Stmt_Expression(
expr: Expr_BinaryOp_Concat(
left: Expr_BinaryOp_ShiftLeft(
left: Scalar_Int(
value: 1
)
right: Scalar_Int(
value: 2
)
)
right: Expr_BinaryOp_ShiftLeft(
left: Scalar_Int(
value: 3
)
right: Scalar_Int(
value: 4
)
)
)
)
)
-----
<?php
1 + 2 . 3 + 4;
1 << 2 . 3 << 4;
-----
!!version=7.4
array(
0: Stmt_Expression(
expr: Expr_BinaryOp_Plus(
left: Expr_BinaryOp_Concat(
left: Expr_BinaryOp_Plus(
left: Scalar_Int(
value: 1
)
right: Scalar_Int(
value: 2
)
)
right: Scalar_Int(
value: 3
)
)
right: Scalar_Int(
value: 4
)
)
)
1: Stmt_Expression(
expr: Expr_BinaryOp_ShiftLeft(
left: Expr_BinaryOp_ShiftLeft(
left: Scalar_Int(
value: 1
)
right: Expr_BinaryOp_Concat(
left: Scalar_Int(
value: 2
)
right: Scalar_Int(
value: 3
)
)
)
right: Scalar_Int(
value: 4
)
)
)
)
|
