php操作数据库封装 php封装函数( 三 )


$this-mysql_query_rst($sql);
if(mysql_errno() == 0){
if(mysql_num_rows($this-result)0){
$tmpfld = @mysql_fetch_row($this-result);
$this-fields = $tmpfld[$fields];
}
return $this-fields;
}else{
return '';
}
}
//错误信息
function msg_error(){
if(mysql_errno() != 0) {
$this-msg = mysql_error();
}
return $this-msg;
}
//释放结果集
function close_rst(){
mysql_free_result($this-result);
$this-msg = '';
$this-fieldsNum = 0;
$this-rowsNum = 0;
$this-filesArray = '';
$this-rowsArray = '';
}
//关闭数据库
function close_conn(){
$this-close_rst();
mysql_close($this-conn);
$this-conn = '';
}
//取得数据库版本
function db_version() {
return mysql_get_server_info();
}
}
PHP中对数据库操作的封装,有什么好的例子吗类文件mysql.class.php:
?php
class Mysql{
//数据库连接返回值
private $conn;
/**
* [构造函数 , 返回值给$conn]
* @param [string] $hostname [主机名]
* @param [string] $username[用户名]
* @param [string] $password[密码]
* @param [string] $dbname[数据库名]
* @param [string] $charset[字符集]
* @return [null]
*/
function __construct($hostname,$username,$password,$dbname,$charset='utf8'){
$config = @mysql_connect($hostname,$username,$password);
if(!$config){
echo '连接失败,请联系管理员';
exit;
}
$this-conn = $config;
$res = mysql_select_db($dbname);
if(!$res){
echo '连接失败,请联系管理员';
exit;
}
mysql_set_charset($charset);
}
function __destruct(){
mysql_close();
}
/**
* [getAll 获取所有信息]
* @param [string] $sql [sql语句]
* @return [array] [返回二维数组]
*/
function getAll($sql){
$result = mysql_query($sql,$this-conn);
$data = https://www.04ip.com/post/array();
if($resultmysql_num_rows($result)0){
while($row = mysql_fetch_assoc($result)){
$data[] = $row;
}
}
return $data;
}
/**
* [getOne 获取单条数据]
* @param [string] $sql [sql语句]
* @return [array] [返回一维数组]
*/
function getOne($sql){
$result = mysql_query($sql,$this-conn);
$data = https://www.04ip.com/post/array();
if($resultmysql_num_rows($result)0){
$data = https://www.04ip.com/post/mysql_fetch_assoc($result);
}
return $data;
}
/**
* [getOne 获取单条数据]
* @param [string] $table [表名]
* @param [string] $data [由字段名当键,属性当键值的一维数组]
* @return [type] [返回false或者插入数据的id]
*/
function insert($table,$data){
$str = '';
$str .="INSERT INTO `$table` ";
$str .="(`".implode("`,`",array_keys($data))."`) ";
$str .=" VALUES ";
$str .= "('".implode("','",$data)."')";
$res = mysql_query($str,$this-conn);
if($resmysql_affected_rows()0){
return mysql_insert_id();
}else{
return false;
}
}
/**
* [update 更新数据库]
* @param [string] $table [表名]
* @param [array] $data [更新的数据,由字段名当键,属性当键值的一维数组]
* @param [string] $where [条件,‘字段名’=‘字段属性’]
* @return [type] [更新成功返回影响的行数,更新失败返回false]
*/
function update($table,$data,$where){
$sql = 'UPDATE '.$table.' SET ';
foreach($data as $key = $value){
$sql .= "`{$key}`='{$value}',";
}
$sql = rtrim($sql,',');
$sql .= " WHERE $where";
$res = mysql_query($sql,$this-conn);

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