㈠ php類怎麼給靜態變數賦值
<?php
classinfo{
publicstatic$height;
publicstatic$age;
function__construct($height,$age){
self::$height=$height;
self::$age=$age;
self::display();
}
publicstaticfunctiondisplay(){
echoself::$height.''.self::$age;
}
}
$info=newinfo('178','23');
?>
㈡ PHP if判斷為什麼執行語句不寫花括弧
大括弧代表代碼塊，表示這些語句是一個整體，如果if後面有多個語句需要執行就要加上括弧，只有一句的話加和不加結果上來說都一樣。
㈢ 怎麼在php程序中調用漢字轉拼音這個方法
$source="中國";
$aim=newCUtf8_PY();
echo$aim->encode($source,'head');
echo" ";
echo$aim->encode($source,'all');
/**
*PHP漢字轉拼音
*@authorJerryli([email protected])
*@versionV0.20140715
*@packageSPFW.core.lib.final
*@globalSEA_PHP_FW_VAR_ENV
*@example
* echoCUtf8_PY::encode('阿里巴巴科技有限公司');//編碼為拼音首字母
* echoCUtf8_PY::encode('阿里巴巴科技有限公司','all');//編碼為全拼音
*/
classCUtf8_PY{
/**
*拼音字元轉換圖
*@vararray
*/
privatestatic$_aMaps=array(
'a'=>-20319,'ai'=>-20317,'an'=>-20304,'ang'=>-20295,'ao'=>-20292,
'ba'=>-20283,''=>-20265,'ban'=>-20257,'bang'=>-20242,'bao'=>-20230,'bei'=>-20051,'ben'=>-20036,'beng'=>-20032,'bi'=>-20026,'bian'=>-20002,'biao'=>-19990,'bie'=>-19986,'bin'=>-19982,'bing'=>-19976,'bo'=>-19805,'bu'=>-19784,
'ca'=>-19775,'cai'=>-19774,'can'=>-19763,'cang'=>-19756,'cao'=>-19751,'ce'=>-19746,'ceng'=>-19741,'cha'=>-19739,'chai'=>-19728,'chan'=>-19725,'chang'=>-19715,'chao'=>-19540,'che'=>-19531,'chen'=>-19525,'cheng'=>-19515,'chi'=>-19500,'chong'=>-19484,'chou'=>-19479,'chu'=>-19467,'chuai'=>-19289,'chuan'=>-19288,'chuang'=>-19281,'chui'=>-19275,'chun'=>-19270,'chuo'=>-19263,'ci'=>-19261,'cong'=>-19249,'cou'=>-19243,'cu'=>-19242,'cuan'=>-19238,'cui'=>-19235,'cun'=>-19227,'cuo'=>-19224,
'da'=>-19218,'dai'=>-19212,'dan'=>-19038,'dang'=>-19023,''=>-19018,'de'=>-19006,'deng'=>-19003,'di'=>-18996,'dian'=>-18977,'diao'=>-18961,'die'=>-18952,'ding'=>-18783,'diu'=>-18774,'dong'=>-18773,'dou'=>-18763,''=>-18756,'an'=>-18741,'i'=>-18735,'n'=>-18731,'o'=>-18722,
'e'=>-18710,'en'=>-18697,'er'=>-18696,
'fa'=>-18526,'fan'=>-18518,'fang'=>-18501,'fei'=>-18490,'fen'=>-18478,'feng'=>-18463,'fo'=>-18448,'fou'=>-18447,'fu'=>-18446,
'ga'=>-18239,'gai'=>-18237,'gan'=>-18231,'gang'=>-18220,'gao'=>-18211,'ge'=>-18201,'gei'=>-18184,'gen'=>-18183,'geng'=>-18181,'gong'=>-18012,'gou'=>-17997,'gu'=>-17988,'gua'=>-17970,'guai'=>-17964,'guan'=>-17961,'guang'=>-17950,'gui'=>-17947,'gun'=>-17931,'guo'=>-17928,
'ha'=>-17922,'hai'=>-17759,'han'=>-17752,'hang'=>-17733,'hao'=>-17730,'he'=>-17721,'hei'=>-17703,'hen'=>-17701,'heng'=>-17697,'hong'=>-17692,'hou'=>-17683,'hu'=>-17676,'hua'=>-17496,'huai'=>-17487,'huan'=>-17482,'huang'=>-17468,'hui'=>-17454,'hun'=>-17433,'huo'=>-17427,
'ji'=>-17417,'jia'=>-17202,'jian'=>-17185,'jiang'=>-16983,'jiao'=>-16970,'jie'=>-16942,'jin'=>-16915,'jing'=>-16733,'jiong'=>-16708,'jiu'=>-16706,'ju'=>-16689,'juan'=>-16664,'jue'=>-16657,'jun'=>-16647,
'ka'=>-16474,'kai'=>-16470,'kan'=>-16465,'kang'=>-16459,'kao'=>-16452,'ke'=>-16448,'ken'=>-16433,'keng'=>-16429,'kong'=>-16427,'kou'=>-16423,'ku'=>-16419,'kua'=>-16412,'kuai'=>-16407,'kuan'=>-16403,'kuang'=>-16401,'kui'=>-16393,'kun'=>-16220,'kuo'=>-16216,
'la'=>-16212,'lai'=>-16205,'lan'=>-16202,'lang'=>-16187,'lao'=>-16180,'le'=>-16171,'lei'=>-16169,'leng'=>-16158,'li'=>-16155,'lia'=>-15959,'lian'=>-15958,'liang'=>-15944,'liao'=>-15933,'lie'=>-15920,'lin'=>-15915,'ling'=>-15903,'liu'=>-15889,'long'=>-15878,'lou'=>-15707,'lu'=>-15701,'lv'=>-15681,'luan'=>-15667,'lue'=>-15661,'lun'=>-15659,'luo'=>-15652,
'ma'=>-15640,'mai'=>-15631,'man'=>-15625,'mang'=>-15454,'mao'=>-15448,'me'=>-15436,'mei'=>-15435,'men'=>-15419,'meng'=>-15416,'mi'=>-15408,'mian'=>-15394,'miao'=>-15385,'mie'=>-15377,'min'=>-15375,'ming'=>-15369,'miu'=>-15363,'mo'=>-15362,'mou'=>-15183,'mu'=>-15180,
'na'=>-15165,'nai'=>-15158,'nan'=>-15153,'nang'=>-15150,'nao'=>-15149,'ne'=>-15144,'nei'=>-15143,'nen'=>-15141,'neng'=>-15140,'ni'=>-15139,'nian'=>-15128,'niang'=>-15121,'niao'=>-15119,'nie'=>-15117,'nin'=>-15110,'ning'=>-15109,'niu'=>-14941,'nong'=>-14937,'nu'=>-14933,'nv'=>-14930,'nuan'=>-14929,'nue'=>-14928,'nuo'=>-14926,
'o'=>-14922,'ou'=>-14921,
'pa'=>-14914,'pai'=>-14908,'pan'=>-14902,'pang'=>-14894,'pao'=>-14889,'pei'=>-14882,'pen'=>-14873,'peng'=>-14871,'pi'=>-14857,'pian'=>-14678,'piao'=>-14674,'pie'=>-14670,'pin'=>-14668,'ping'=>-14663,'po'=>-14654,'pu'=>-14645,
'qi'=>-14630,'qia'=>-14594,'qian'=>-14429,'qiang'=>-14407,'qiao'=>-14399,'qie'=>-14384,'qin'=>-14379,'qing'=>-14368,'qiong'=>-14355,'qiu'=>-14353,'qu'=>-14345,'quan'=>-14170,'que'=>-14159,'qun'=>-14151,
'ran'=>-14149,'rang'=>-14145,'rao'=>-14140,'re'=>-14137,'ren'=>-14135,'reng'=>-14125,'ri'=>-14123,'rong'=>-14122,'rou'=>-14112,'ru'=>-14109,'ruan'=>-14099,'rui'=>-14097,'run'=>-14094,'ruo'=>-14092,
'sa'=>-14090,'sai'=>-14087,'san'=>-14083,'sang'=>-13917,'sao'=>-13914,'se'=>-13910,'sen'=>-13907,'seng'=>-13906,'sha'=>-13905,'shai'=>-13896,'shan'=>-13894,'shang'=>-13878,'shao'=>-13870,'she'=>-13859,'shen'=>-13847,'sheng'=>-13831,'shi'=>-13658,'shou'=>-13611,'shu'=>-13601,'shua'=>-13406,'shuai'=>-13404,'shuan'=>-13400,'shuang'=>-13398,'shui'=>-13395,'shun'=>-13391,'shuo'=>-13387,'si'=>-13383,'song'=>-13367,'sou'=>-13359,'su'=>-13356,'suan'=>-13343,'sui'=>-13340,'sun'=>-13329,'suo'=>-13326,
'ta'=>-13318,'tai'=>-13147,'tan'=>-13138,'tang'=>-13120,'tao'=>-13107,'te'=>-13096,'teng'=>-13095,'ti'=>-13091,'tian'=>-13076,'tiao'=>-13068,'tie'=>-13063,'ting'=>-13060,'tong'=>-12888,'tou'=>-12875,'tu'=>-12871,'tuan'=>-12860,'tui'=>-12858,'tun'=>-12852,'tuo'=>-12849,
'wa'=>-12838,'wai'=>-12831,'wan'=>-12829,'wang'=>-12812,'wei'=>-12802,'wen'=>-12607,'weng'=>-12597,'wo'=>-12594,'wu'=>-12585,
'xi'=>-12556,'xia'=>-12359,'xian'=>-12346,'xiang'=>-12320,'xiao'=>-12300,'xie'=>-12120,'xin'=>-12099,'xing'=>-12089,'xiong'=>-12074,'xiu'=>-12067,'xu'=>-12058,'xuan'=>-12039,'xue'=>-11867,'xun'=>-11861,
'ya'=>-11847,'yan'=>-11831,'yang'=>-11798,'yao'=>-11781,'ye'=>-11604,'yi'=>-11589,'yin'=>-11536,'ying'=>-11358,'yo'=>-11340,'yong'=>-11339,'you'=>-11324,'yu'=>-11303,'yuan'=>-11097,'yue'=>-11077,'yun'=>-11067,
'za'=>-11055,'zai'=>-11052,'zan'=>-11045,'zang'=>-11041,'zao'=>-11038,'ze'=>-11024,'zei'=>-11020,'zen'=>-11019,'zeng'=>-11018,'zha'=>-11014,'zhai'=>-10838,'zhan'=>-10832,'zhang'=>-10815,'zhao'=>-10800,'zhe'=>-10790,'zhen'=>-10780,'zheng'=>-10764,''=>-10587,'zhong'=>-10544,'zhou'=>-10533,'zhu'=>-10519,'zhua'=>-10331,'zhuai'=>-10329,'zhuan'=>-10328,'zhuang'=>-10322,'zhui'=>-10315,'zhun'=>-10309,'zhuo'=>-10307,'zi'=>-10296,'zong'=>-10281,'zou'=>-10274,'zu'=>-10270,'zuan'=>-10262,'zui'=>-10260,'zun'=>-10256,'zuo'=>-10254
);
/**
*將中文編碼成拼音
*@paramstring$utf8Datautf8字元集數據
*@paramstring$sRetFormat返回格式[head:首字母|all:全拼音]
*@returnstring
*/
publicstaticfunctionencode($utf8Data,$sRetFormat='head'){
$sGBK=iconv('UTF-8','GBK',$utf8Data);
$aBuf=array();
for($i=0,$iLoop=strlen($sGBK);$i<$iLoop;$i++){
$iChr=ord($sGBK{$i});
if($iChr>160)
$iChr=($iChr<<8)+ord($sGBK{++$i})-65536;
if('head'===$sRetFormat)
$aBuf[]=substr(self::zh2py($iChr),0,1);
else
$aBuf[]=self::zh2py($iChr);
}
if('head'===$sRetFormat)
returnimplode('',$aBuf);
else
returnimplode('',$aBuf);
}
/**
*中文轉換到拼音(每次處理一個字元)
*@paramnumber$iWORD待處理字元雙位元組
*@returnstring拼音
*/
privatestaticfunctionzh2py($iWORD){
if($iWORD>0&&$iWORD<160){
returnchr($iWORD);
}elseif($iWORD<-20319||$iWORD>-10247){
return'';
}else{
foreach(self::$_aMapsas$py=>$code){
if($code>$iWORD)break;
$result=$py;
}
return$result;
}
}
}
http://blog.csdn.net/hzbigdog/article/details/37817135
㈣ php 單例模式 不明白$ins 是什麼意思 沒理解了在單例中是怎麼發生的作用
單例的作用是保證在類被調用的時候只被實例化一次
並且每次調用的都是該被實例化的類
作用可以思考，一個資料庫鏈接，在一次訪問中只需要一個資料庫鏈接，並不應該產生多個資料庫鏈接
實現的方式是通過聲明一個靜態變數，用來存儲唯一的實例化對象
類被調用的方式不是童工new的實例化調用，為了保證不在外部被實例化，所以需要將__construct()實例化函數設置為私有或者子類繼承，通過統一的調用介面調用，在你的例子裡面就是getlns
該函數中判斷了靜態變數是否是滿足自身的介面設定，不滿足則實例化自己
你的代碼在return $this->data[$key];這句應該是錯誤的
整個getlns應該改為如下
public static function getIns(){
if(!self::$ins instanceof self ){
self::$ins = new self():
}
return self::$ins;
}
你估計是寫錯了函數，你可以發現你的getlns中沒喲$key變數，但內部卻調用了，所以你應該再檢查下你寫的代碼
㈤ php self()
//self指向類本身
classtest{
publicstatic$name=123;
模歷functiona(){
echoself::$name;//調用類的屬性
}
functionb(){
$b=newself();//實旦嘩搜例化這個類
var_mp($b);
}
}
$test=newtest();
$test->a();
$test->蘆碧b();
㈥ php redis 需要使用單例嗎
<?php
/**
* Class RedisConnManager
*
* 單例模式對redis實例的操作的進一步封裝
* 主要目的：防止過多的連接，一個頁面只能存在一個聲明連接
*
* @author ：cuihuan
*/
class RedisManager
{
private static $redisInstance;
/**
* 私有化構造函數
* 原因：防止外界調用構造新的對象
*/
private function __construct(){}
/**
* 獲取redis連接的唯一出口
*/
static public function getRedisConn(){
if(!self::$redisInstance instanceof self){
self::$redisInstance = new self;
}
// 獲取當前單例
$temp = self::$redisInstance;
// 調用私有化方法
return $temp->connRedis();
}
/**
* 連接ocean 上的redis的私有化方法
* @return Redis
*/
static private function connRedis()
{
try {
$redis_ocean = new Redis();
$redis_ocean->connect(G::$conf['redis-host'], G::$conf['redis-port']);
$redis_ocean->auth(G::$conf['redis-pass']);
}catch (Exception $e){
echo $e->getMessage().'<br/>';
}
return $redis_ocean;
}
}
㈦ PHP請問在static的function中如何訪問變數
靜態方法只能訪問其他的靜態方法或屬性，比如
classA{
privatestatic$url;
($url){
self::$url=$url;
}
(){
returnself::$url;
}
}
//或者在你的靜態方法中獲得實例，當然這樣的話可能達不到你預期的效果，推薦你還是使用上面的方法。
classA{
private$url='demo';
publicstaticfunctiongetUrl(){
$obj=newself();
return$obj->url;
}
}
㈧ php連接資料庫失敗
mysql_connect();
你先用php文配輪瞎件培空調用這個填上你的信息參數
看看連接成不桐悶成功，然後看下mysql_error 出來什麼
㈨ PHP self為什麼可以訪問非靜態方法
要明確self 與 this的區別，不要把self與this混淆，這一點很重要：
this 的含義是 「當前對象」 或是 「類的當前實例」，而 self 表示 「當前類」 或 「當前對象所屬的類」。
㈩ PHP設計模式之單例模式
單例模式
:使得類的一個對象成為系統中的唯一實例.
PHP中使用單例模式最常見的就是資料庫操作了。避免在系統中有多個連接資料庫的操作，浪費系統資源的現象，就可以使用單例模式。每次對資料庫操作都使用一個實例。
簡單示例
class
AClass
{
//
用來存儲自己實例
public
static
$instance;
//
私有化構造函數，防止外界實例化對象
private
function
__construct()
{}
//
私有化克隆函數，防止外界克隆對象
private
function
__clone()
{}
//
靜態方法，單例訪問統一入口
public
static
function
getInstance()
{
if
(!(self::$instance
instanceof
self)){
self::$instance
=
new
self();
}
return
self::$instance;
}
//
test
public
function
test()
{
return
"done";
}
//
私有化克隆函數，防止外界克隆對象
private
function
__clone()
{}
}
class
BClass
extends
AClass{
}
//
獲取實例
$aclass
=
AClass::getInstance();
$bclass
=
BClass::getInstance();
//
調用方法
echo
$aclass->test();
對一些比較大型的應用來說，可能連接多個資料庫，那麼不同的資料庫公用一個對象可能會產生問題，比如連接句柄的分配等，我們可以通過給$instance變成數組，通過不同的參數來控制
簡單示例
class
DB
{
//
用來存儲自己實例
public
static
$instance
=
array();
public
$conn;
//
私有化構造函數，防止外界實例化對象
private
function
__construct($host,
$username,
$password,
$dbname,
$port)
{
$this->conn
=
new
mysqli($host,
$username,
$password,
$dbname,
$port);
}
//
靜態方法，單例訪問統一入口
public
static
function
getInstance($host,
$username,
$password,
$dbname,
$port)
{
$key
=
$host.":".$port;
if
(!(self::$instance[$key]
instanceof
self)){
self::$instance[$key]
=
new
self($host,
$username,
$password,
$dbname,
$port);#實例化
}
return
self::$instance[$key];
}
//query
public
function
query($ql)
{
return
$this->conn->query($sql);
}
//
私有化克隆函數，防止外界克隆對象
private
function
__clone()
{}
//釋放資源
public
function
__destruct(){
$this->conn->close();
}
}