1Return and pass by ref
2-----
3<?php
4
5function a(&$b) {}
6function &a($b) {}
7-----
8array(
9    0: Stmt_Function(
10        attrGroups: array(
11        )
12        byRef: false
13        name: Identifier(
14            name: a
15        )
16        params: array(
17            0: Param(
18                attrGroups: array(
19                )
20                flags: 0
21                type: null
22                byRef: true
23                variadic: false
24                var: Expr_Variable(
25                    name: b
26                )
27                default: null
28                hooks: array(
29                )
30            )
31        )
32        returnType: null
33        stmts: array(
34        )
35    )
36    1: Stmt_Function(
37        attrGroups: array(
38        )
39        byRef: true
40        name: Identifier(
41            name: a
42        )
43        params: array(
44            0: Param(
45                attrGroups: array(
46                )
47                flags: 0
48                type: null
49                byRef: false
50                variadic: false
51                var: Expr_Variable(
52                    name: b
53                )
54                default: null
55                hooks: array(
56                )
57            )
58        )
59        returnType: null
60        stmts: array(
61        )
62    )
63)
64