1 <?php
2
3
4 //数组引用
5 $arr = array('a','b','c','d');
6 $x = & $arr[1];
7 $tmp = $arr;
8 $arr[1] = 'e';
9 echo $tmp[1]; //e
10
11 //数组指针
12 $arr = array('a','b','c','d');
13 foreach($arr as $key => $val){
14 }
15 var_dump(current($arr)); //boolean false
16
17 foreach($arr as $key => $val){
18 $arr[$key]=$val;
19 }
20 var_dump(current($arr)); //b
21
22
23
24 /*Array
25 (
26 [0] => a
27 [1] => b
28 [2] => c
29 [3] => a
30 )
31 Array
32 (
33 [0] => a
34 [1] => b
35 [2] => c
36 [3] => b
37 )
38 Array
39 (
40 [0] => a
41 [1] => b
42 [2] => c
43 [3] => c
44 )
45 Array
46 (
47 [0] => a
48 [1] => b
49 [2] => c
50 [3] => c
51 )*/
52 foreach($arr as &$v){
53 }
54
55 foreach($arr as $v){
56 print_r($arr);
57 }
