php查詢數(shù)據(jù)庫(kù)封裝 php數(shù)據(jù)庫(kù)查詢結(jié)果處理

PHP中對(duì)數(shù)據(jù)庫(kù)操作的封裝，有什么好的例子嗎

類文件mysql.class.php：

創(chuàng)新互聯(lián)專業(yè)為企業(yè)提供四平網(wǎng)站建設(shè)、四平做網(wǎng)站、四平網(wǎng)站設(shè)計(jì)、四平網(wǎng)站制作等企業(yè)網(wǎng)站建設(shè)、網(wǎng)頁(yè)設(shè)計(jì)與制作、四平企業(yè)網(wǎng)站模板建站服務(wù)，10多年四平做網(wǎng)站經(jīng)驗(yàn)，不只是建網(wǎng)站，更提供有價(jià)值的思路和整體網(wǎng)絡(luò)服務(wù)。

?php

class?Mysql{

//數(shù)據(jù)庫(kù)連接返回值

private?$conn;

/**

*?[構(gòu)造函數(shù)，返回值給$conn]

*?@param?[string]?$hostname?[主機(jī)名]

*?@param?[string]?$username[用戶名]

*?@param?[string]?$password[密碼]

*?@param?[string]?$dbname[數(shù)據(jù)庫(kù)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?'連接失敗，請(qǐng)聯(lián)系管理員';

exit;

}

$this-conn?=?$config;

$res?=?mysql_select_db($dbname);

if(!$res){

echo?'連接失敗，請(qǐng)聯(lián)系管理員';

exit;

}

mysql_set_charset($charset);

}

function?__destruct(){

mysql_close();

}

/**

*?[getAll?獲取所有信息]

*?@param?[string]?$sql?[sql語(yǔ)句]

*?@return?[array]?[返回二維數(shù)組]

*/

function?getAll($sql){

$result?=?mysql_query($sql,$this-conn);

$data?=?array();

if($result??mysql_num_rows($result)0){

while($row?=?mysql_fetch_assoc($result)){

$data[]?=?$row;

}

}

return?$data;

}

/**

*?[getOne?獲取單條數(shù)據(jù)]

*?@param?[string]?$sql?[sql語(yǔ)句]

*?@return?[array]?[返回一維數(shù)組]

*/

function?getOne($sql){

$result?=?mysql_query($sql,$this-conn);

$data?=?array();

if($result??mysql_num_rows($result)0){

$data?=?mysql_fetch_assoc($result);

}

return?$data;

}

/**

*?[getOne?獲取單條數(shù)據(jù)]

*?@param?[string]?$table?[表名]

*?@param?[string]?$data?[由字段名當(dāng)鍵，屬性當(dāng)鍵值的一維數(shù)組]

*?@return?[type]?[返回false或者插入數(shù)據(jù)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($res??mysql_affected_rows()0){

return?mysql_insert_id();

}else{

return?false;

}

}

/**

*?[update?更新數(shù)據(jù)庫(kù)]

*?@param?[string]?$table?[表名]

*?@param?[array]?$data?[更新的數(shù)據(jù)，由字段名當(dāng)鍵，屬性當(dāng)鍵值的一維數(shù)組]

*?@param?[string]?$where?[條件，‘字段名’=‘字段屬性’]

*?@return?[type]?[更新成功返回影響的行數(shù)，更新失敗返回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);

if($res??mysql_affected_rows()){

return?mysql_affected_rows();

}else{

return?false;

}

}

/**

*?[delete?刪除數(shù)據(jù)]

*?@param?[string]?$table?[表名]

*?@param?[string]?$where?[條件，‘字段名’=‘字段屬性’]

*?@return?[type]?[成功返回影響的行數(shù)，失敗返回false]

*/

function?del($table,$where){

$sql?=?"DELETE?FROM?`{$table}`?WHERE?{$where}";

$res?=?mysql_query($sql,$this-conn);

if($res??mysql_affected_rows()){

return?mysql_affected_rows();

}else{

return?false;

}

}

}

?

使用案例:

?php

//包含數(shù)據(jù)庫(kù)操作類文件

include?'mysql.class.php';

//設(shè)置傳入?yún)?shù)

$hostname='localhost';

$username='root';

$password='123456';

$dbname='aisi';

$charset?=?'utf8';

//實(shí)例化對(duì)象

$db?=?new?Mysql($hostname,$username,$password,$dbname);

//獲取一條數(shù)據(jù)

$sql?=?"SELECT?count(as_article_id)?as?count?FROM?as_article?where?as_article_type_id=1";

$count?=?$db-getOne($sql);

//獲取多條數(shù)據(jù)

$sql?=?"SELECT?*?FROM?as_article?where?as_article_type_id=1?order?by?as_article_addtime?desc?limit?$start,$limit";

$service?=?$db-getAll($sql);

//插入數(shù)據(jù)

$arr?=?array(

'as_article_title'='數(shù)據(jù)庫(kù)操作類',

'as_article_author'='rex',

);

$res?=?$db-insert('as_article',$arr);

//更新數(shù)據(jù)

$arr?=?array(

'as_article_title'='實(shí)例化對(duì)象',

'as_article_author'='Lee',

);

$where?=?"as_article_id=1";

$res?=?$db-update('as_article',$arr,$where);

//刪除數(shù)據(jù)

$where?=?"as_article_id=1";

$res?=?$db-del('as_article',$where);

?

PHP訪問(wèn)MYSQL數(shù)據(jù)庫(kù)封裝類(附函數(shù)說(shuō)明)

復(fù)制代碼

代碼如下:

?php

/*

MYSQL

數(shù)據(jù)庫(kù)訪問(wèn)封裝類

MYSQL

數(shù)據(jù)訪問(wèn)方式，php4支持以mysql_開(kāi)頭的過(guò)程訪問(wèn)方式，php5開(kāi)始支持以mysqli_開(kāi)頭的過(guò)程和mysqli面向?qū)ο?/p>

訪問(wèn)方式，本封裝類以mysql_封裝

數(shù)據(jù)訪問(wèn)的一般流程：

1,連接數(shù)據(jù)庫(kù)

mysql_connect

or

mysql_pconnect

2,選擇數(shù)據(jù)庫(kù)

mysql_select_db

3,執(zhí)行SQL查詢

mysql_query

4,處理返回的數(shù)據(jù)

mysql_fetch_array

mysql_num_rows

mysql_fetch_assoc

mysql_fetch_row

etc

*/

class

db_mysql

{

var

$querynum

=

;

//當(dāng)前頁(yè)面進(jìn)程查詢數(shù)據(jù)庫(kù)的次數(shù)

var

$dblink

;

//數(shù)據(jù)庫(kù)連接資源

//鏈接數(shù)據(jù)庫(kù)

function

connect($dbhost,$dbuser,$dbpw,$dbname='',$dbcharset='utf-8',$pconnect=0

,

$halt=true)

{

$func

=

empty($pconnect)

?

'mysql_connect'

:

'mysql_pconnect'

;

$this-dblink

=

@$func($dbhost,$dbuser,$dbpw)

;

if

($halt

!$this-dblink)

{

$this-halt("無(wú)法鏈接數(shù)據(jù)庫(kù)！");

}

//設(shè)置查詢字符集

mysql_query("SET

character_set_connection={$dbcharset},character_set_results={$dbcharset},character_set_client=binary",$this-dblink)

;

//選擇數(shù)據(jù)庫(kù)

$dbname

@mysql_select_db($dbname,$this-dblink)

;

}

//選擇數(shù)據(jù)庫(kù)

function

select_db($dbname)

{

return

mysql_select_db($dbname,$this-dblink);

}

//執(zhí)行SQL查詢

function

query($sql)

{

$this-querynum++

;

return

mysql_query($sql,$this-dblink)

;

}

//返回最近一次與連接句柄關(guān)聯(lián)的INSERT，UPDATE

或DELETE

查詢所影響的記錄行數(shù)

function

affected_rows()

{

return

mysql_affected_rows($this-dblink)

;

}

//取得結(jié)果集中行的數(shù)目,只對(duì)select查詢的結(jié)果集有效

function

num_rows($result)

{

return

mysql_num_rows($result)

;

}

//獲得單格的查詢結(jié)果

function

result($result,$row=0)

{

return

mysql_result($result,$row)

;

}

//取得上一步

INSERT

操作產(chǎn)生的

ID,只對(duì)表有AUTO_INCREMENT

ID的操作有效

function

insert_id()

{

return

($id

=

mysql_insert_id($this-dblink))

=

?

$id

:

$this-result($this-query("SELECT

last_insert_id()"),

0);

}

//從結(jié)果集提取當(dāng)前行，以數(shù)字為key表示的關(guān)聯(lián)數(shù)組形式返回

function

fetch_row($result)

{

return

mysql_fetch_row($result)

;

}

//從結(jié)果集提取當(dāng)前行，以字段名為key表示的關(guān)聯(lián)數(shù)組形式返回

function

fetch_assoc($result)

{

return

mysql_fetch_assoc($result);

}

//從結(jié)果集提取當(dāng)前行，以字段名和數(shù)字為key表示的關(guān)聯(lián)數(shù)組形式返回

function

fetch_array($result)

{

return

mysql_fetch_array($result);

}

//關(guān)閉鏈接

function

close()

{

return

mysql_close($this-dblink)

;

}

//輸出簡(jiǎn)單的錯(cuò)誤html提示信息并終止程序

function

halt($msg)

{

$message

=

"html\nhead\n"

;

$message

.=

"meta

content='text/html;charset=gb2312'\n"

;

$message

.=

"/head\n"

;

$message

.=

"body\n"

;

$message

.=

"數(shù)據(jù)庫(kù)出錯(cuò)：".htmlspecialchars($msg)."\n"

;

$message

.=

"/body\n"

;

$message

.=

"/html"

;

echo

$message

;

exit

;

}

}

?

求PHP數(shù)據(jù)庫(kù)封裝類操作代碼

?php

class MySQL{

private $host; //服務(wù)器地址

private $name; //登錄賬號(hào)

private $pwd; //登錄密碼

private $dBase; //數(shù)據(jù)庫(kù)名稱

private $conn; //數(shù)據(jù)庫(kù)鏈接資源

private $result; //結(jié)果集

private $msg; //返回結(jié)果

private $fields; //返回字段

private $fieldsNum; //返回字段數(shù)

private $rowsNum; //返回結(jié)果數(shù)

private $rowsRst; //返回單條記錄的字段數(shù)組

private $filesArray = array(); //返回字段數(shù)組

private $rowsArray = array(); //返回結(jié)果數(shù)組

private $charset='utf8'; //設(shè)置操作的字符集

private $query_count=0; //查詢結(jié)果次數(shù)

static private $_instance; //存儲(chǔ)對(duì)象

//初始化類

private function __construct($host='',$name='',$pwd='',$dBase=''){

if($host != '') $this-host = $host;

if($name != '') $this-name = $name;

if($pwd != '') $this-pwd = $pwd;

if($dBase != '') $this-dBase = $dBase;

$this-init_conn();

}

//防止被克隆

private function __clone(){}

public static function getInstance($host='',$name='',$pwd='',$dBase=''){

if(FALSE == (self::$_instance instanceof self)){

self::$_instance = new self($host,$name,$pwd,$dBase);

}

return self::$_instance;

}

public function __set($name,$value){

$this-$name=$value;

}

public function __get($name){

return $this-$name;

}

//鏈接數(shù)據(jù)庫(kù)

function init_conn(){

$this-conn=@mysql_connect($this-host,$this-name,$this-pwd) or die('connect db fail !');

@mysql_select_db($this-dBase,$this-conn) or die('select db fail !');

mysql_query("set names ".$this-charset);

}

//查詢結(jié)果

function mysql_query_rst($sql){

if($this-conn == '') $this-init_conn();

$this-result = @mysql_query($sql,$this-conn);

$this-query_count++;

}

//取得字段數(shù)

function getFieldsNum($sql){

$this-mysql_query_rst($sql);

$this-fieldsNum = @mysql_num_fields($this-result);

}

//取得查詢結(jié)果數(shù)

function getRowsNum($sql){

$this-mysql_query_rst($sql);

if(mysql_errno() == 0){

return @mysql_num_rows($this-result);

}else{

return '';

}

}

//取得記錄數(shù)組（單條記錄）

function getRowsRst($sql,$type=MYSQL_BOTH){

$this-mysql_query_rst($sql);

if(empty($this-result)) return '';

if(mysql_error() == 0){

$this-rowsRst = mysql_fetch_array($this-result,$type);

return $this-rowsRst;

}else{

return '';

}

}

//取得記錄數(shù)組（多條記錄）

function getRowsArray($sql,$type=MYSQL_BOTH){

!empty($this-rowsArray) ? $this-rowsArray=array() : '';

$this-mysql_query_rst($sql);

if(mysql_errno() == 0){

while($row = mysql_fetch_array($this-result,$type)) {

$this-rowsArray[] = $row;

}

return $this-rowsArray;

}else{

return '';

}

}

//更新、刪除、添加記錄數(shù)

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 '';

}

}

//返回最近插入的一條數(shù)據(jù)庫(kù)的id值

function returnRstId($sql){

if($this-conn == ''){

$this-init_conn();

}

@mysql_query($sql);

if(mysql_errno() == 0){

return mysql_insert_id();

}else{

return '';

}

}

//獲取對(duì)應(yīng)的字段值

function getFields($sql,$fields){

$this-mysql_query_rst($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 '';

}

}

//錯(cuò)誤信息

function msg_error(){

if(mysql_errno() != 0) {

$this-msg = mysql_error();

}

return $this-msg;

}

//釋放結(jié)果集

function close_rst(){

mysql_free_result($this-result);

$this-msg = '';

$this-fieldsNum = 0;

$this-rowsNum = 0;

$this-filesArray = '';

$this-rowsArray = '';

}

//關(guān)閉數(shù)據(jù)庫(kù)

function close_conn(){

$this-close_rst();

mysql_close($this-conn);

$this-conn = '';

}

//取得數(shù)據(jù)庫(kù)版本

function db_version() {

return mysql_get_server_info();

}

}

php封裝一個(gè)class類實(shí)現(xiàn)mysql數(shù)據(jù)庫(kù)的增刪該查

?php

class db{

private $db;

const MYSQL_OPT_READ_TIMEOUT = 11;

const MYSQL_OPT_WRITE_TIMEOUT = 12;

private $tbl_name;

private $where;

private $sort;

private $fields;

private $limit;

public static $_instance = null;

function __construct(){

$cfg = loadConfig('db');

$db = mysqli_init();

$db-options(self::MYSQL_OPT_READ_TIMEOUT, 3);

$db-options(self::MYSQL_OPT_WRITE_TIMEOUT, 1);

@$db-real_connect($cfg['host'],$cfg['user'],$cfg['pwd'],$cfg['db']);

if ($db-connect_error) {

$this-crash($db-errno,$db-error);

}

$db-set_charset("utf8");

$this-db = $db;

//echo $this-db-stat;

}

public static function getInstance(){

if(!(self::$_instance instanceof self)){

self::$_instance = new self();

}

return self::$_instance;

}

private function __clone() {} //覆蓋__clone()方法，禁止克隆

public function find($conditions = null){

if($conditions) $this-where($conditions);

return $this-getArray($this-buildSql(),1);

}

public function findAll($conditions = null){

if($conditions) $this-where($conditions);

return $this-getArray($this-buildSql());

}

//表

public function t($table){ $this-tbl_name = $table; return $this;}

//條件

public function where($conditions){

$where = '';

if(is_array($conditions)){

$join = array();

foreach( $conditions as $key = $condition ){

$condition = $this-db-real_escape_string($condition);

$join[] = "`{$key}` = '{$condition}'";

}

$where = "WHERE ".join(" AND ",$join);

}else{

if(null != $conditions) $where = "WHERE ".$conditions;

}

$this-where = $where;

return $this;

}

//排序

public function sort($sort){

if(null != $sort) $sort = "ORDER BY {$sort}";

$this-sort = $sort;

return $this;

}

//字段

public function fields($fields){ $this-fields = $fields; return $this; }

public function limit($limit){$this-limit = $limit; return $this;}

private function buildSql(){

$this-fields = empty($this-fields) ? "*" : $this-fields;

$sql = "SELECT {$this-fields} FROM {$this-tbl_name} {$this-where} {$this-sort}";

accessLog('db_access',$sql);

if(null != $this-limit)$sql .= " limit {$this-limit}";

return $sql;

}

/**

* 返回查詢數(shù)據(jù)

* @param $sql

* @param bool $hasOne

* @return array|bool|mixed

*/

private function getArray($sql,$hasOne = false){

if($this-db-real_query($sql) ){

if ($result = $this-db-use_result()) {

$row = array();

if($hasOne){

$row = $result-fetch_assoc();

}else{

while($d = $result-fetch_assoc()) $row[] = $d;

}

$result-close();

$this-fields = "*";

return $row;

}else{

return false;

}

}else{

if($this-db-error){

$this-crash($this-db-errno,$this-db-error,$sql);

}

}

}

public function findSql($sql,$hasOne = false){

accessLog('db_access',$sql);

if($this-db-real_query($sql) ){

if ($result = $this-db-use_result()) {

$row = array();

if($hasOne){

$row = $result-fetch_assoc();

}else{

while($d = $result-fetch_assoc()) $row[] = $d;

}

$result-close();

$this-fields = "*";

return $row;

}else{

return false;

}

}else{

if($this-db-error){

$this-crash($this-db-errno,$this-db-error,$sql);

}

}

}

public function create($row){

if(!is_array($row))return FALSE;

$row = $this-prepera_format($row);

if(empty($row))return FALSE;

foreach($row as $key = $value){

$cols[] = '`'.$key.'`';

$vals[] = "'".$this-db-real_escape_string($value)."'";

}

$col = implode(',', $cols);

$val = implode(',', $vals);

$sql = "INSERT INTO `{$this-tbl_name}` ({$col}) VALUES ({$val})";

accessLog('db_access',$sql);

if( FALSE != $this-db-query($sql) ){ // 獲取當(dāng)前新增的ID

if($this-db-insert_id){

return $this-db-insert_id;

}

if($this-db-affected_rows){

return true;

}

}

return FALSE;

}

//直接執(zhí)行sql

public function runSql($sql){

accessLog('db_access',$sql);

if( FALSE != $this-db-query($sql) ){ // 獲取當(dāng)前新增的ID

return true;

}else{

return false;

}

}

public function update($row){

$where = "";

$row = $this-prepera_format($row);

if(empty($row))return FALSE;

foreach($row as $key = $value){

$value = $this-db-real_escape_string($value);

$vals[] = "`{$key}` = '{$value}'";

}

$values = join(", ",$vals);

$sql = "UPDATE {$this-tbl_name} SET {$values} {$this-where}";

accessLog('db_access',$sql);

if( FALSE != $this-db-query($sql) ){ // 獲取當(dāng)前新增的ID

if( $this-db-affected_rows){

return true;

}

}

return false;

}

function delete(){

$sql = "DELETE FROM {$this-tbl_name} {$this-where}";

if( FALSE != $this-db-query($sql) ){ // 獲取當(dāng)前新增的ID

if( $this-db-affected_rows){

return true;

}

}

return FALSE;

}

private function prepera_format($rows){

$columns = $this-getArray("DESCRIBE {$this-tbl_name}");

$newcol = array();

foreach( $columns as $col ){

$newcol[$col['Field']] = $col['Field'];

}

return array_intersect_key($rows,$newcol);

}

//崩潰信息

private function crash($number,$message,$sql=''){

$msg = 'Db Error '.$number.':'.$message ;

if(empty($sql)){

echo t('db_crash');

}else{

$msg .= " SQL:".$sql;

echo t('db_query_err');

}

accessLog('db_error',$msg);

exit;

}

}

本文標(biāo)題：php查詢數(shù)據(jù)庫(kù)封裝 php數(shù)據(jù)庫(kù)查詢結(jié)果處理
分享鏈接：http://www.muchs.cn/article48/ddijpep.html

成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián)，為您提供服務(wù)器托管、網(wǎng)站排名、網(wǎng)站內(nèi)鏈、網(wǎng)站改版、品牌網(wǎng)站建設(shè)、

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請(qǐng)盡快告知，我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng)，如需處理請(qǐng)聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時(shí)需注明來(lái)源： 創(chuàng)新互聯(lián)