php telnet功能实例代码

例子，php telnet功能实现代码。

3. class PHPTelnet {

4. var $show_connect_error=1;

5. var $use_usleep=0; // change to 1 for faster execution

6. // don't change to 1 on Windows servers unless you have PHP 5
7. var $sleeptime=125000;
8. var $loginsleeptime=1000000;

9. var $fp=NULL;

10. var $loginprompt;

11. var $conn1;

12. var $conn2;

13. /*

14. 0 = success
15. 1 = couldn't open network connection
16. 2 = unknown host
17. 3 = login failed
18. 4 = PHP version too low
19. */
20. function Connect($server,$user,$pass) {
21. $rv=0;
22. $vers=explode('.',PHP_VERSION);
23. $needvers=array(4,3,0);
24. $j=count($vers);
25. $k=count($needvers);
26. if ($k for ($i=0;$i if (($vers[$i]+0)>$needvers[$i]) break;
27. if (($vers[$i]+0) $this->ConnectError(4);
28. return 4;
29. }
30. }

31. $this->Disconnect();

32. if (strlen($server)) {

33. if (preg_match('/[^0-9.]/',$server)) {
34. $ip=gethostbyname($server);
35. if ($ip==$server) {
36. $ip='';
37. $rv=2;
38. }
39. } else $ip=$server;
40. } else $ip='127.0.0.1';

41. if (strlen($ip)) {

42. if ($this->fp=fsockopen($ip,23)) {
43. fputs($this->fp,$this->conn1);
44. $this->Sleep();

45. fputs($this->fp,$this->conn2);

46. $this->Sleep();
47. $this->GetResponse($r);
48. $r=explode("\n",$r);
49. $this->loginprompt=$r[count($r)-1];

50. fputs($this->fp,"$user\n");

51. $this->Sleep();

52. fputs($this->fp,"$pass\n");

53. if ($this->use_usleep) usleep($this->loginsleeptime);
54. else sleep(1);
55. $this->GetResponse($r);
56. $r=explode("\n",$r);
57. if (($r[count($r)-1]=='')||($this->loginprompt==$r[count($r)-1])) {
58. $rv=3;
59. $this->Disconnect();
60. }
61. } else $rv=1;
62. }

63. if ($rv) $this->ConnectError($rv);

64. return $rv;
65. }

66. function Disconnect($exit=1) {

67. if ($this->fp) {
68. if ($exit) $this->DoCommand('exit',$junk);
69. fclose($this->fp);
70. $this->fp=NULL;
71. }
72. }

73. function DoCommand($c,&$r) {

74. if ($this->fp) {
75. fputs($this->fp,"$c\n");
76. $this->Sleep();
77. $this->GetResponse($r);
78. $r=preg_replace("/^.*?\n(.*)\n[^\n]*$/","$1",$r);
79. }
80. return $this->fp?1:0;
81. }

82. function GetResponse(&$r) {

83. $r='';
84. do {
85. $r.=fread($this->fp, 1024);
86. $s=socket_get_status($this->fp);
87. } while ($s['unread_bytes']);
88. }

89. function Sleep() {

90. if ($this->use_usleep) usleep($this->sleeptime);
91. else sleep(1);
92. }

93. //telnet功能主函数

94. function PHPTelnet() {
95. $this->conn1=chr(0xFF).chr(0xFB).chr(0x1F).chr(0xFF).chr(0xFB).
96. chr(0x20).chr(0xFF).chr(0xFB).chr(0x18).chr(0xFF).chr(0xFB).
97. chr(0x27).chr(0xFF).chr(0xFD).chr(0x01).chr(0xFF).chr(0xFB).
98. chr(0x03).chr(0xFF).chr(0xFD).chr(0x03).chr(0xFF).chr(0xFC).
99. chr(0x23).chr(0xFF).chr(0xFC).chr(0x24).chr(0xFF).chr(0xFA).
100. chr(0x1F).chr(0x00).chr(0x50).chr(0x00).chr(0x18).chr(0xFF).
101. chr(0xF0).chr(0xFF).chr(0xFA).chr(0x20).chr(0x00).chr(0x33).
102. chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0x2C).chr(0x33).
103. chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0xFF).chr(0xF0).
104. chr(0xFF).chr(0xFA).chr(0x27).chr(0x00).chr(0xFF).chr(0xF0).
105. chr(0xFF).chr(0xFA).chr(0x18).chr(0x00).chr(0x58).chr(0x54).
106. chr(0x45).chr(0x52).chr(0x4D).chr(0xFF).chr(0xF0);
107. $this->conn2=chr(0xFF).chr(0xFC).chr(0x01).chr(0xFF).chr(0xFC).
108. chr(0x22).chr(0xFF).chr(0xFE).chr(0x05).chr(0xFF).chr(0xFC).chr(0x21);
109. }

110. function ConnectError($num) {

111. if ($this->show_connect_error) switch ($num) {
112. case 1: echo '
     [PHP Telnet] Connect failed: Unable to open network connection
     '; break;
113. case 2: echo '
     [PHP Telnet] Connect failed: Unknown host
     '; break;
114. case 3: echo '
     [PHP Telnet] Connect failed: Login failed
     '; break;
115. case 4: echo '
     [PHP Telnet] Connect failed: Your server\'s PHP version is too low for PHP Telnet
     '; break;
116. }
117. }
118. }
119. ?>

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