Declaring exit and die function stubs
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<?php

function exit(string|int $status = 0): never {}

function die(string|int $status = 0): never {}
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array(
    0: Stmt_Function(
        attrGroups: array(
        )
        byRef: false
        name: Identifier(
            name: exit
        )
        params: array(
            0: Param(
                attrGroups: array(
                )
                flags: 0
                type: UnionType(
                    types: array(
                        0: Identifier(
                            name: string
                        )
                        1: Identifier(
                            name: int
                        )
                    )
                )
                byRef: false
                variadic: false
                var: Expr_Variable(
                    name: status
                )
                default: Scalar_Int(
                    value: 0
                )
                hooks: array(
                )
            )
        )
        returnType: Identifier(
            name: never
        )
        stmts: array(
        )
    )
    1: Stmt_Function(
        attrGroups: array(
        )
        byRef: false
        name: Identifier(
            name: die
        )
        params: array(
            0: Param(
                attrGroups: array(
                )
                flags: 0
                type: UnionType(
                    types: array(
                        0: Identifier(
                            name: string
                        )
                        1: Identifier(
                            name: int
                        )
                    )
                )
                byRef: false
                variadic: false
                var: Expr_Variable(
                    name: status
                )
                default: Scalar_Int(
                    value: 0
                )
                hooks: array(
                )
            )
        )
        returnType: Identifier(
            name: never
        )
        stmts: array(
        )
    )
)