php mysql 封装类实例代码
发布时间：2020-05-25 13:41:29 所属栏目：PHP 来源：互联网
导读：这篇文章主要介绍了php mysql 封装类实例代码，非常不错，具有参考借鉴价值,需要的朋友可以参考下
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废话不多说了，具体代码如下所示： db_host = $db_host; $this->db_user = $db_user; $this->db_pwd = $db_pwd; $this->db_database = $db_database; $this->conn = $conn; $this->coding = $coding; $this->connect(); } /*数据库连接*/ public function connect() { if ($this->conn == "pconn") { //永久链接 $this->conn = mysql_pconnect($this->db_host,$this->db_user,$this->db_pwd); } else { //即使链接 $this->conn = mysql_connect($this->db_host,$this->db_pwd); } if (!mysql_select_db($this->db_database,$this->conn)) { if ($this->show_error) { $this->show_error("数据库不可用：",$this->db_database); } } mysql_query("SET NAMES $this->coding"); } /*数据库执行语句，可执行查询添加修改删除等任何sql语句*/ public function query($sql) { if ($sql == "") { $this->show_error("SQL语句错误：","SQL查询语句为空"); } $this->sql = $sql; $result = mysql_query($this->sql,$this->conn); if (!$result) { //调试中使用，sql语句出错时会自动打印出来 if ($this->show_error) { $this->show_error("错误SQL语句：",$this->sql); } } else { $this->result = $result; } return $this->result; } /*创建添加新的数据库*/ public function create_database($database_name) { $database = $database_name; $sqlDatabase = 'create database ' . $database; $this->query($sqlDatabase); } /*查询服务器所有数据库*/ //将系统数据库与用户数据库分开，更直观的显示？ public function show_databases() { $this->query("show databases"); echo "现有数据库：" . $amount = $this->db_num_rows($rs); echo ""; $i = 1; while ($row = $this->fetch_array($rs)) { echo "$i $row[Database]"; echo " "; $i++; } } //以数组形式返回主机中所有数据库名 public function databases() { $rsPtr = mysql_list_dbs($this->conn); $i = 0; $cnt = mysql_num_rows($rsPtr); while ($i < $cnt) { $rs[] = mysql_db_name($rsPtr,$i); $i++; } return $rs; } /*查询数据库下所有的表*/ public function show_tables($database_name) { $this->query("show tables"); echo "现有数据库：" . $amount = $this->db_num_rows($rs); echo " "; $i = 1; while ($row = $this->fetch_array($rs)) { $columnName = "Tables_in_" . $database_name; echo "$i $row[$columnName]"; echo " "; $i++; } } /* mysql_fetch_row() array $row[0],$row[1],$row[2] mysql_fetch_array() array $row[0] 或 $row[id] mysql_fetch_assoc() array 用$row->content 字段大小写敏感 mysql_fetch_object() object 用$row[id],$row[content] 字段大小写敏感 */ /*取得结果数据*/ public function mysql_result_li() { return mysql_result($str); } /*取得记录集,获取数组-索引和关联,使用$row['content'] */ public function fetch_array($resultt="") { if($resultt<>""){ return mysql_fetch_array($resultt); }else{ return mysql_fetch_array($this->result); } } //获取关联数组,使用$row['字段名'] public function fetch_assoc() { return mysql_fetch_assoc($this->result); } //获取数字索引数组,使用$row[0],$row[2] public function fetch_row() { return mysql_fetch_row($this->result); } //获取对象数组,使用$row->content public function fetch_Object() { return mysql_fetch_object($this->result); } //简化查询select public function findall($table) { $this->query("SELECT * FROM $table"); } //简化查询select public function select($table,$columnName = "*",$condition = '',$debug = '') { $condition = $condition ? ' Where ' . $condition : NULL; if ($debug) { echo "SELECT $columnName FROM $table $condition"; } else { $this->query("SELECT $columnName FROM $table $condition"); } } //简化删除del public function delete($table,$condition,$url = '') { if ($this->query("DELETE FROM $table WHERE $condition")) { if (!empty ($url)) $this->Get_admin_msg($url,'删除成功！'); } } //简化插入insert public function insert($table,$columnName,$value,$url = '') { if ($this->query("INSERT INTO $table ($columnName) VALUES ($value)")) { if (!empty ($url)) $this->Get_admin_msg($url,'添加成功！'); } } //简化修改update public function update($table,$mod_content,$url = '') { //echo "UPDATE $table SET $mod_content WHERE $condition"; exit(); if ($this->query("UPDATE $table SET $mod_content WHERE $condition")) { if (!empty ($url)) $this->Get_admin_msg($url); } } /*取得上一步 INSERT 操作产生的 ID*/ public function insert_id() { return mysql_insert_id(); } //指向确定的一条数据记录 public function db_data_seek($id) { if ($id > 0) { $id = $id -1; } if (!@ mysql_data_seek($this->result,$id)) { $this->show_error("SQL语句有误：","指定的数据为空"); } return $this->result; } // 根据select查询结果计算结果集条数 public function db_num_rows() { if ($this->result == null) { if ($this->show_error) { $this->show_error("SQL语句错误","暂时为空，没有任何内容！"); } } else { return mysql_num_rows($this->result); } } // 根据insert,update,delete执行结果取得影响行数 public function db_affected_rows() { return mysql_affected_rows(); } //输出显示sql语句 public function show_error($message = "",$sql = "") { if (!$sql) { echo "" . $message . ""; echo " "; } else { echo ""; echo " "; } //释放结果集 public function free() { @ mysql_free_result($this->result); } //数据库选择 public function select_db($db_database) { return mysql_select_db($db_database); } //查询字段数量 public function num_fields($table_name) { //return mysql_num_fields($this->result); $this->query("select * from $table_name"); echo " "; echo "字段数：" . $total = mysql_num_fields($this->result); echo " ";
for ($i = 0; $i < $total; $i++) {
print_r(mysql_fetch_field($this->result,$i));
}
echo "";
echo ""; } //取得 MySQL 服务器信息 public function mysql_server($num = '') { switch ($num) { case 1 : return mysql_get_server_info(); //MySQL 服务器信息 break; case 2 : return mysql_get_host_info(); //取得 MySQL 主机信息 break; case 3 : return mysql_get_client_info(); //取得 MySQL 客户端信息 break; case 4 : return mysql_get_proto_info(); //取得 MySQL 协议信息 break; default : return mysql_get_client_info(); //默认取得mysql版本信息 } } //析构函数，自动关闭数据库,垃圾回收机制 public function __destruct() { if (!empty ($this->result)) { $this->free(); } mysql_close($this->conn); } //function __destruct(); /*获得客户端真实的IP地址*/ function getip() { if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"),"unknown")) { $ip = getenv("HTTP_CLIENT_IP"); } else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"),"unknown")) { $ip = getenv("HTTP_X_FORWARDED_FOR"); } else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"),"unknown")) { $ip = getenv("REMOTE_ADDR"); } else if (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'],"unknown")) { $ip = $_SERVER['REMOTE_ADDR']; } else { $ip = "unknown"; } return ($ip); } function inject_check($sql_str) { //防止注入 $check = eregi('select|insert|update|delete|'|/*|*|../|./|union|into|load_file|outfile',$sql_str); if ($check) { echo "输入非法注入内容！"; exit (); } else { return $sql_str; } } function checkurl() { //检查来路 if (preg_replace("/https?://([^:/]+).*/i","1",$_SERVER['HTTP_REFERER']) !== preg_replace("/([^:]+).*/",$_SERVER['HTTP_HOST'])) { header("Location: http://www.dareng.com"); exit(); } } } ?> 以上所述是小编给大家介绍的php mysql 封装类实例代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的，在此也非常感谢大家对脚本之家网站的支持！ （编辑：安卓应用网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |