Encapsed strings
-----
<?php

"$A";
"$A->B";
"$A[B]";
"$A[0]";
"$A[0x0]";
"{$A}";
"{$A['B']}";
"${A}";
"${A['B']}";
"${$A}";
"A $B C";
b"$A";
-----
array(
    0: Scalar_Encapsed(
        parts: array(
            0: Expr_Variable(
                name: A
            )
        )
    )
    1: Scalar_Encapsed(
        parts: array(
            0: Expr_PropertyFetch(
                var: Expr_Variable(
                    name: A
                )
                name: B
            )
        )
    )
    2: Scalar_Encapsed(
        parts: array(
            0: Expr_ArrayDimFetch(
                var: Expr_Variable(
                    name: A
                )
                dim: Scalar_String(
                    value: B
                )
            )
        )
    )
    3: Scalar_Encapsed(
        parts: array(
            0: Expr_ArrayDimFetch(
                var: Expr_Variable(
                    name: A
                )
                dim: Scalar_String(
                    value: 0
                )
            )
        )
    )
    4: Scalar_Encapsed(
        parts: array(
            0: Expr_ArrayDimFetch(
                var: Expr_Variable(
                    name: A
                )
                dim: Scalar_String(
                    value: 0x0
                )
            )
        )
    )
    5: Scalar_Encapsed(
        parts: array(
            0: Expr_Variable(
                name: A
            )
        )
    )
    6: Scalar_Encapsed(
        parts: array(
            0: Expr_ArrayDimFetch(
                var: Expr_Variable(
                    name: A
                )
                dim: Scalar_String(
                    value: B
                )
            )
        )
    )
    7: Scalar_Encapsed(
        parts: array(
            0: Expr_Variable(
                name: A
            )
        )
    )
    8: Scalar_Encapsed(
        parts: array(
            0: Expr_ArrayDimFetch(
                var: Expr_Variable(
                    name: A
                )
                dim: Scalar_String(
                    value: B
                )
            )
        )
    )
    9: Scalar_Encapsed(
        parts: array(
            0: Expr_Variable(
                name: Expr_Variable(
                    name: A
                )
            )
        )
    )
    10: Scalar_Encapsed(
        parts: array(
            0: A
            1: Expr_Variable(
                name: B
            )
            2:  C
        )
    )
    11: Scalar_Encapsed(
        parts: array(
            0: Expr_Variable(
                name: A
            )
        )
    )
)