PHP 5.5.0版之前的php+mysql的链接方法
1、基础操做
- 发起会话
$conn = @mysql_connect($host,$name,$pwd);
- 选择数据库
@mysql_select_db($db,$conn);
- 设置参数(如:编码)
mysql_query("set names gb2312"); //设置编码
- 操做(CURL)
- 关闭会话
mysql_close($conn);
2、封装类库
目录
| pro 项目目录
| -- | mysql.php
| -- | index.php
文件mysql.php
<?php
//PHP 5.5.0版之前
class mysql {
private $host = 'localhost'; //服务器地址
private $name = 'root'; //登陆帐号
private $pwd = 'root'; //登陆密码
private $db = 'db'; //数据库名称
private $conn = ''; //数据库链接资源
private $result = ''; //结果集
private $msg = ''; //返回结果
private $fields; //返回字段
private $fieldsNum = 0; //返回字段数
private $rowsNum = 0; //返回结果数
private $rowsRst = ''; //返回单条记录的字段数组
private $filesArray = array(); //返回字段数组
private $rowsArray = array(); //返回结果数组
function __construct($host='',$name='',$pwd='',$db=''){
if(!empty($host)) $this->host = $host;
if(!empty($name)) $this->name = $name;
if(!empty($pwd)) $this->pwd = $pwd;
if(!empty($db)) $this->db = $db;
$this->init_conn();
}
//链接数据库
function init_conn(){
$this->conn = @mysql_connect($this->host,$this->name,$this->pwd);
@mysql_select_db($this->db,$this->conn);
mysql_query("set names gb2312"); //设置编码
}
//查询结果
function mysql_query_rst($sql){
if($this->conn == '') $this->init_conn();
$this->result = @mysql_query($sql,$this->conn);
}
//返回查询记录数函数
function getRowsNum($sql){
$this->mysql_query_rst($sql);
if(mysql_errno() == 0){
return @mysql_num_rows($this->result);
}else{
return '';
}
}
//取得记录数函数
function getRowsRst($sql){
$this->mysql_query_rst($sql);
if(mysql_errno() == 0){
$this->rewsRst = mysql_fetch_array($this->result,MYSQL_ASSOC);
return $this->rewsRst;
}else{
return '';
}
}
//取得记录数组(多条记录)
function getRowsArray($sql){
$this->mysql_query_rst($sql);
if(mysql_errno() == 0){
while($row = mysql_fetch_array($this->result,MYSQL_ASSOC)){
$this->rowsArray[] = $row;
}
return $this->rowsArray;
}else{
return '';
}
}
//返回更新、删除、添加的记录数函数
function uidRst($sql){
if($this->conn == '') $this->init_conn();
@mysql_query($sql);
$this->rowsNum = @mysql_affected_rows();
if(mysql_errno() == 0){
return $this->rowsNum;
}else{
return '';
}
}
//释放结果集函数
function close_rst(){
mysql_free_result($this->result);
$this->msg = '';
$this->fieldsNum = 0;
$this->rowsNum = 0;
$this->filesArray = '';
$this->rowsArray = '';
}
//关闭数据库函数
function close_conn(){
$this->close_rst();
mysql_close($this->conn);
$this->conn = '';
}
}
?>
文件index.php
<?php
//使用方法
require_once('mysql.php');
$mysql = new mysql();
$sql = "SELECT * FROM `user` WHERE id=1";
var_dump($opmysql->getRowsRst($sql));
die();
?>