Explicit octal syntax
-----
<?php
0o123;
0O123;
0o1_2_3;
0o1000000000000000000000;
-----
array(
    0: Stmt_Expression(
        expr: Scalar_LNumber(
            value: 83
        )
    )
    1: Stmt_Expression(
        expr: Scalar_LNumber(
            value: 83
        )
    )
    2: Stmt_Expression(
        expr: Scalar_LNumber(
            value: 83
        )
    )
    3: Stmt_Expression(
        expr: Scalar_DNumber(
            value: 9.2233720368548E+18
        )
    )
)