php来实现telnet的连接、传递命令、获取返回值等功能！

<?php

02.

error_reporting

(-1);

03.

04.

class

Telnet
{

05.

var

$sock

=
NULL;

06.

07.

function

telnet(

$host

,

$port

)
{

08.

$this

->sock
=

fsockopen

(

$host

,

$port

);

09.

socket_set_timeout(

$this

->sock,2,0);

10.

}

11.

12.

function

close()
{

13.

if

(

$this

->sock)
fclose(

$this

->sock);

14.

$this

->sock
=NULL;

15.

}

16.

17.

function

write(

$buffer

)
{

18.

$buffer

=

str_replace

(

chr

(255),

chr

(255).

chr

(255),

$buffer

);

19.

fwrite(

$this

->sock,

$buffer

);

20.

}

21.

22.

function

getc()
{

23.

return

fgetc

(

$this

->sock);

24.

}

25.

26.

function

read_till(

$what

)
{

27.

$buf

=

''

;

28.

while

(1)
{

29.

$IAC

=

chr

(255);

30.

31.

$DONT

=

chr

(254);

32.

$DO

=

chr

(253);

33.

34.

$WONT

=

chr

(252);

35.

$WILL

=

chr

(251);

36.

37.

$theNULL

=

chr

(0);

38.

39.

$c

=

$this

->getc();

40.

41.

if

(

$c

===
false)

return

$buf

;

42.

if

(

$c

==

$theNULL

)
{

43.

continue

;

44.

}

45.

46.

if

(

$c

==

"1"

)
{

47.

continue

;

48.

}

49.

50.

if

(

$c

!=

$IAC

)
{

51.

$buf

.=

$c

;

52.

53.

if

(

$what

==
(

substr

(

$buf

,

strlen

(

$buf

)-

strlen

(

$what

))))
{

54.

return

$buf

;

55.

}

56.

else

{

57.

continue

;

58.

}

59.

}

60.

61.

$c

=

$this

->getc();

62.

63.

if

(

$c

==

$IAC

)
{

64.

$buf

.=

$c

;

65.

}

66.

else

if

((

$c

==

$DO

)
|| (

$c

==

$DONT

))
{

67.

$opt

=

$this

->getc();

68.

//
echo "we wont ".ord($opt)."\n";

69.

fwrite(

$this

->sock,

$IAC

.

$WONT

.

$opt

);

70.

}

71.

elseif

((

$c

==

$WILL

)
|| (

$c

==

$WONT

))
{

72.

$opt

=

$this

->getc();

73.

//
echo "we dont ".ord($opt)."\n";

74.

fwrite(

$this

->sock,

$IAC

.

$DONT

.

$opt

);

75.

}

76.

else

{

77.

//
echo "where are we? c=".ord($c)."\n";

78.

}

79.

}

80.

}

81.

}

82.

83.

/*

84.

$telnet
=new telnet("192.168.0.1",23);

85.

echo
$telnet->read_till("login: ");

86.

$telnet->write("kongxx\r\n");

87.

echo
$telnet->read_till("password: ");

88.

$telnet->write("KONGXX\r\n");

89.

echo
$telnet->read_till(":> ");

90.

$telnet->write("ls\r\n");

91.

echo
$telnet->read_till(":> ");

92.

echo
$telnet->close();

93.

94.

*/