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php telnet function implementation code

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Release： 2016-07-25 09:13:02
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本节内容： php telnet功能实例

文件：telnet.php

  3. error_reporting(-1);

  4. //telnet功能类

  5. class Telnet {
  6. var $sock = NULL;
  8. function telnet($host,$port) {
  9. $this->sock = fsockopen($host,$port);
  10. socket_set_timeout($this->sock,2,0);
  11. }

  12. function close() {

  13. if ($this->sock) fclose($this->sock);
  14. $this->sock = NULL;
  15. }
  17. function write($buffer) {
  18. $buffer = str_replace(chr(255),chr(255).chr(255),$buffer);
  19. fwrite($this->sock,$buffer);
  20. }
  22. function getc() {
  23. return fgetc($this->sock);
  24. }

  25. function read_till($what) {

  26. $buf = '';
  27. while (1) {
  28. $IAC = chr(255);
  30. $DONT = chr(254);
  31. $DO = chr(253);
  33. $WONT = chr(252);
  34. $WILL = chr(251);
  36. $theNULL = chr(0);
  38. $c = $this->getc();
  40. if ($c === false) return $buf;
  41. if ($c == $theNULL) {
  42. continue;
  43. }
  45. if ($c == "1") {
  46. continue;
  47. }

  48. if ($c != $IAC) {

  49. $buf .= $c;
  51. if ($what == (substr($buf,strlen($buf)-strlen($what)))) {
  52. return $buf;
  53. }
  54. else {
  55. continue;
  56. }
  57. } // bbs.it-home.org

  58. $c = $this->getc();

  60. if ($c == $IAC) {
  61. $buf .= $c;
  62. }
  63. else if (($c == $DO) || ($c == $DONT)) {
  64. $opt = $this->getc();
  65. // echo "we wont ".ord($opt)."n";
  66. fwrite($this->sock,$IAC.$WONT.$opt);
  67. }
  68. elseif (($c == $WILL) || ($c == $WONT)) {
  69. $opt = $this->getc();
  70. // echo "we dont ".ord($opt)."n";
  71. fwrite($this->sock,$IAC.$DONT.$opt);
  72. }
  73. else {
  74. // echo "where are we? c=".ord($c)."n";
  75. }
  76. }
  77. }
  78. }

  79. /*

  80. 使用方法
  81. telnet类的调用
  82. $telnet = new telnet("192.168.0.1",23);
  83. echo $telnet->read_till("login: ");
  84. $telnet->write("kongxxrn");
  85. echo $telnet->read_till("password: ");
  86. $telnet->write("KONGXXrn");
  87. echo $telnet->read_till(":> ");
  88. $telnet->write("lsrn");
  89. echo $telnet->read_till(":> ");
  90. echo $telnet->close();
  91. */

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php telnet功能实现代码
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