Php testing performance code

Functionmicrotime_float () {list ($ usec, $ sec) explode (& quot;, microtime (); return (float) $ usec + (float) $ sec);} functionechotime ($ name) {stati

1. Function microtime_float ()
2. {
3. List ($ usec, $ sec) = explode ("", microtime ());
4. Return (float) $ usec + (float) $ sec );
5. }
6. Function echotime ($ name)
7. {
8. Static $ t_start = 0;
9. $ T_end = microtime_float ();
10. If ($ name! = 'Start '){
11. $ Time = $ t_end-$ t_start;
12. Echo ($ name .':');
13. Echo intval ($ time * 1000 );
14. Echo"
    \ N ";
15. }
16. $ T_start = $ t_end;
17. }
18. $ Index = 1000;
19. $ Loop = 10000;
20. $ Length = 10000;
21. $ Key = "abc". $ index;
22. $ Array = array ();
23. For ($ I = 0; $ I <$ length; $ I ++ ){
24. $ Array ['ABC'. $ I] = 'abc'. $ I;
25. }
26. Echotime ('start ');
27. For ($ I = 0; $ I <$ loop; $ I ++ ){
28. If (array_key_exists ($ key, $ array )){
29. $ A = true;
30. }
31. }
32. Echotime ('Array _ key_exists ');
33. For ($ I = 0; $ I <$ loop; $ I ++ ){
34. If (isset ($ array [$ key]) {
35. $ A = true;
36. }
37. }
38. Echotime ('isset ');
39. For ($ I = 0; $ I <$ loop; $ I ++ ){
40. If (in_array ($ key, $ array )){
41. $ A = true;
42. }
43. }
44. Echotime ('in _ array ');
45. For ($ I = 0; $ I <$ loop; $ I ++ ){
46. If (array_search ($ key, $ array )){
47. $ A = true;
48. }
49. }
50. Echotime ('Array _ Search ');
51. $ Array2 = array_flip ($ array );
52. For ($ I = 0; $ I <$ loop; $ I ++ ){
53. If (isset ($ array2 [$ key]) {
54. $ A = true;
55. }
56. }
57. Echotime ('Flip and Search ');
58. $ Array2 = $ array;
59. Foreach ($ array2 as $ k => $ v ){
60. $ Array2 [$ k] = strtoupper ($ v );
61. }
62. Echotime ('foreach1 ');
63. $ Array2 = $ array;
64. Foreach ($ array2 as & $ v ){
65. $ V = strtoupper ($ v );
66. }
67. Echotime ('foreach2 ');
68. $ Array2 = $ array;
69. $ Array2 = array_map ('strtoupper ', $ array2 );
70. Echotime ('Array _ map ');