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Jul 25, 2016 am 09:11 AM
數(shù)據(jù)庫連接操作類
  2. class mysql
  3. {
  5. private $_link;
  8. public function __construct($dbhost,$dbuser,$dbpassword,$dbname,$charset='utf8')
  9. {
  10. $this->_link = mysql_connect($dbhost,$dbuser,$dbpassword,true); /*連接數(shù)據(jù)庫*/
  11. $this->_link or $this->errmsg('Can't connect to MySQL server!'); /*是否連接成功*/
  12. if ($this->version() > '4.1') { /*檢查數(shù)據(jù)庫版本*/
  13. $this->query('set names '.$charset); /*設置數(shù)據(jù)庫編碼*/
  14. }
  15. mysql_select_db($dbname,$this->_link) or $this->errmsg('Can't select the database!'); /*打開數(shù)據(jù)庫*/
  16. }
  19. /*執(zhí)行數(shù)據(jù)庫操作*/
  20. public function query($sql)
  21. {
  23. $result = mysql_query($sql,$this->_link);
  24. $result or $this->errmsg('Execute sql sentence error!');
  25. return $result;
  26. }
  29. /*返回根據(jù)從結(jié)果集取得的行生成的數(shù)組*/
  30. /*MYSQL_BOTH 得到一個同時包含關聯(lián)和數(shù)字索引的數(shù)組 (如同 mysql_fetch_array())*/
  31. /*MYSQL_ASSOC 得到一個同時包含關聯(lián)和數(shù)字索引的數(shù)組 (如同 mysql_fetch_assoc())*/
  32. /*MYSQL_NUM 得到一個同時包含關聯(lián)和數(shù)字索引的數(shù)組 (如同 mysql_fetch_row())*/
  33. public function fetch_array($result,$type = MYSQL_BOTH)
  34. {
  35. return mysql_fetch_array($result,$type);
  36. }
  38. /*返回根據(jù)所取得的行生成的對象*/
  39. public function fetch_object($result)
  40. {
  41. return mysql_fetch_object($result);
  42. }
  44. /*取得前一次 MySQL 操作所影響的記錄行數(shù)*/
  45. public function affected_rows()
  46. {
  47. return mysql_affected_rows($this->_link);
  48. }
  50. /* 釋放結(jié)果內(nèi)存*/
  51. public function free_result($result)
  52. {
  53. return mysql_free_result($result);
  54. }
  56. /* 取得結(jié)果集中行的數(shù)目*/
  57. public function num_rows($result)
  58. {
  59. return mysql_num_rows($result);
  60. }
  63. /* 取得結(jié)果集中字段的數(shù)目*/
  64. public function num_fields($result)
  65. {
  66. return mysql_num_fields($result);
  67. }
  69. /*取得上一步 INSERT 操作產(chǎn)生的 ID*/
  70. public function insert_id()
  71. {
  72. return mysql_insert_id($this->_link);
  73. }
  75. /* 發(fā)出mysql執(zhí)行錯誤*/
  76. private function errmsg($msg)
  77. {
  78. $message = 'A mysql error has occurred!
    ';
  79. $message .= 'Error Number:'. mysql_errno($this->_link) .'
    ';
  80. $message .= 'Error Description:'. $msg . mysql_error($this->_link) .'
    ';
  81. $message .= 'Error Time:'. date('Y-m-d H:i:s');
  82. exit($message);
  83. }
  86. /*返回連接的標識*/
  87. public function link_id()
  88. {
  89. return $this->_link;
  90. }
  93. /*返回數(shù)據(jù)庫服務器版本*/
  94. public function version() {
  95. return mysql_get_server_info($this->_link);
  96. }
  99. /*獲得客戶端真實的IP地址*/
  100. function getip() {
  101. if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) {
  102. $ip = getenv("HTTP_CLIENT_IP");
  103. } else
  104. if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) {
  105. $ip = getenv("HTTP_X_FORWARDED_FOR");
  106. } else
  107. if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) {
  108. $ip = getenv("REMOTE_ADDR");
  109. } else
  110. if (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) {
  111. $ip = $_SERVER['REMOTE_ADDR'];
  112. } else {
  113. $ip = "unknown";
  114. }
  115. return ($ip);
  116. }
  119. }
復制代碼


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