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本文作者: 苏洋
创建时间: 2012年02月20日
统计字数: 7662字
阅读时间: 16分钟阅读
本文链接: https://soulteary.com/2012/02/20/phpmysql%E6%93%8D%E4%BD%9C%E7%B1%BB.html
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# PHP MySQL 操作类
没仔细测试,回头到学校再说吧。
```php
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_user, $this->db_pwd);
}
if (!mysql_select_db($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[1],$row[2]
public function fetch_row() {
return mysql_fetch_row($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, $condition, $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 "" . $message . "";
echo "
";
} else {
echo "
";
for ($i = 0; $i < $total; $i++) {
print_r(mysql_fetch_field($this->result, $i));
}
echo "
";
echo "