php达成ping_php根底_脚本之家【云顶集团线路检测

作者:云顶集团线路检测

以下是在Linux下通过Apache+PHP对Mysql数据库的备份的文书代码:

咨询的小聪明 Copyright 二〇〇〇 by Eric S. 雷蒙德 汉语版Copyleft 二〇〇〇 by D.H.Grand 塞尔维亚共和国语版: 感谢埃里克的恒心引导和允许,本文才干够产生并发布,本指南 德文版版权为EricSteven 雷Mond全部, 普通话版版权由D.H.Grand[nOBODY/Ginux]富有。 在黑客世界里,当建议叁个技术难点时,你能博得怎么样的答问?这有赖于挖出答案的难度,相像在于你问问的秘技。本指南目的在于扶持你加强咨询手艺,以 获取你最想要的答案。 首先你必得掌握,黑客们只偏心艰难的任务,或然能振作感奋他们构思的好主题材料。 倘使不然,大家还来干啊?借使您有值得大家每每咀嚼玩味的好主题材料,大家自 会对您感激涕零。好难题是激发,是豪华大礼,可以抓好我们的精通力,况且平常会揭示我们原先从没有过发掘到可能思考过的标题。对红客来说,“问得好!”是发自内心的全力赞许。 纵然骇客们有鄙视轻便难题和不温和的坏名望,一时看起来宛如大家对生手, 对文化缺少者怀有敌意,但实际上不是那么的。 大家不想隐敝对这么局地人的鄙弃--他们不愿思谋,恐怕在咨询前不去做到他 们应该做的事。这种人只会谋害时间--他们只愿索取,从不付出,无端消耗我们的光阴,而大家本能够把时光用在越来越有意思的主题素材或然更值得回答的人身上。 我们称那样的人为“战败者”(由于历史原因,大家有的时候 把它拼作“lusers”)。 大家在非常的大程度上归属志愿者,从繁忙的活着中腾出时间来解除纠缠答疑,並且日常被提问撤消。所以大家阴毒的滤掉一部分话题,特别是放弃那三个看起来象失利者的 家伙,以便更迅捷的施用时间来回答胜利者的标题。 假诺您认为我们过于高傲的神态令你不爽,让你委屈,不要紧设身处地动脑。我们并不曾供给你向大家投降--事实上,大家中的大多数人最赏识公平贸易不过了,只要你提交小小努力来满意最起码的渴求,大家就能招待你投入到我们的 文化中来。但让大家扶助这多少个不情愿协理和煦的人是一贯不 意义的。要是您不能够经受这种“歧视”,大家提议你花点钱找家商业百货店签个 手艺援助合同得了,别向红客恳求辅助。 假让你说了算向大家求助,当然不期望被视为退步者,更不愿成为失利者中的一 员。马上获得实惠答案的最棒格局,就是象胜利者那样提问--聪明、自信、有 解决难题的思路,只是有的时候候在一定的标题上急需获得一点扶持。 (应接对本指南建议校勘意见。任何提出请E-mail至esr@thyrsus.com,然而请注意,本文并不是网络礼节的通用指南,小编平日会拒绝无语于在本事论坛获得有用答案的提出。) (当然,要是你写中文,最棒依旧寄到DHGrand@hotmail.com;-) ======== 提问早前 ======== 在通过电邮、新闻组或然闲谈室提议本领难题前,检查你有未达成: 1. 通读手册,试着谐和找答案。 2. 在FAQ里找答案。 3. 在网络查找。 4. 向你身边看家本领的爱侣询问。 当你提出难点的时候,首先要表明在此以前你干了些什么;那将推向树立你 的形象:你不是贰个图谋一无所能的乞讨的人,不愿浪费外人的时光。假诺问问 者能从答案中学到东西,大家更愿意回答他的标题。 周详的动脑,准备好你的难点,草率的讯问只好获取草率的回应,可能根本得 不到其余答案。越表现出在寻求支援前为消除难题交给的全力,你越能博取实 质性的支持。 小心别问错了问题。即便您的标题基于错误的假如,普通hacker常常会用无意义的字面解释来应对你,心里想着“蠢难题...”,希 看着你会从难点的应对中吸收教导。 决不要自感到够资格获得答案,你没这种身份。毕竟你未曾为这种服务支出任 何薪水。你要团结去“挣”回叁个答案,靠提议叁个有内涵的,有趣的,有思 维慰勉功能的标题--三个对社区的阅世有潜在进献的难点,而不只是颓靡的 从外人处索要知识--去挣到那么些答案。 另一面,注解你愿意在找答案的长河中做点什么,是二个蛮好的开头。 “哪个人能给点提示?”、“小编这一个事例里缺了什么?”以至“作者应当检查什么 地方?”比“请把切合的历程贴出来”更便于获得回复。因为你展现只要有 人指导正确的倾向,你就有变成它的力量和决心。 ======== 如何提问 ======== ------------ 谨严采取论坛 ------------ 小心选用提问的场子。假如象上面描述的那样,你很只怕被忽视掉或许被视作战败者:

使用了php的PEAR和DB|// +----------------------------------------------------------------------+//// $Id: sql2xml.php,v 1.59 2001/11/13 10:54:02 chregu Exp $/*** This class takes a PEAR::DB-Result Object, a sql-query-string or an array*and returns a xml-representation of it.** TODO*-encoding etc, options for header*-ERROR CHECKING** Usage example** include_once ;* include_once;* $db = DB::connect("mysql://root@localhost/xmltest");* $sql2xml = new xml_sql2xml();* //the next one is only needed, if you need others than the default* $sql2xml->setEncoding;* $result = $db->query("select * from bands");* $xmlstring = $sql2xml->getXML;** or** include_once ;* include_once;* $sql2xml = new xml_sql2xml("mysql://root@localhost/xmltest");* $sql2xml->Add("select * from bands");* $xmlstring = $sql2xml->getXML();** More documentation and a tutorial/how-to can be found at* @authorChristian Stocker * @version$Id: sql2xml.php,v 1.59 2001/11/13 10:54:02 chregu Exp $* @packageXML*/class XML_sql2xml {/*** If joined-tables should be output nested.*Means, if you have joined two or more queries, the later*specified tables will be nested within the result of the former*table.*Works at the moment only with mysql automagically. For other RDBMS*you have to provide your table-relations by hand ** @varboolean* @see$user_tableinfo, doSql2Xml;*/var $nested = True;/*** Name of the tag element for resultsets** @varstring* @seeinsertNewResult()*/var $tagNameResult = "result";/*** Name of the tag element for rows** @varstring* @seeinsertNewRow()*/var $tagNameRow = "row";/**** @varobject PEAR::DB* @access private*/var $db = Null;/*** Options to be used in extended Classes (for example in sql2xml_ext).* They are passed with SetOptions as an array (arrary("user_options" = array;*and can then be accessed with $this->user_options["bla"] from your*extended classes for additional features.*This array is not use in this base class, it's only for passing easy parameters*to extended classes.** @vararray*/var $user_options = array();/*** The DomDocument Object to be used in the whole class** @varobjectDomDocument* @accessprivate*/var $xmldoc;/*** The Root of the domxml object* I'm not sure, if we need this as a class variable....* could be replaced by domxml_root;** @varobject DomNode*php达成ping_php根底_脚本之家【云顶集团线路检测】,提问的精通_php底工_脚本之家。 @accessprivate*/var $xmlroot;/*** This array is used to give the structure of your database to the class.*It's especially useful, if you don't use mysql, since other RDBMS than*mysql are not able at the moment to provide the right information about*your database structure within the query. And if you have more than 2*tables joined in the sql it's also not possible for mysql to find out*your real relations.*The parameters are the same as in fieldInfo from the PEAR::DB and some*additional ones. Here they come:*From PEAR::DB->fieldinfo:**$tableInfo[$i]["table"]: the table, which field #$i belongs to.*for some rdbms/comples queries and with arrays, it's impossible*to find out to which table the field actually belongs. You can*specify it here more accurate. Or if you want, that one fields*belongs to another table, than it actually says (yes, there's*use for that, see the upcoming tutorial ...)**$tableInfo[$i]["name"]: the name of field #$i. if you want another*name for the tag, than the query or your array provides, assign*云顶集团线路检测 ,it here.**Additional info*$tableInfo["parent_key"][$table]: index of the parent key for $table.*this is the field, where the programm looks for changes, if this*field changes, it assumes, that we need a new "rowset" in the*parent table.**$tableInfo["parent_table"][$table]: name of the parent table for $table.** @vararray* @accessprivate*/var $user_tableInfo = array();/*** the encoding type, the input from the db has*/var $encoding_from= "ISO-8859-1";/*** the encoding type, the output in the xml should have* (note that domxml at the moment only support UTF-8, or at least it looks like)*/var $encoding_to = "gb2312";var $tagname = "tagname";/*** Constructor* The Constructor can take a Pear::DB "data source name" (eg.*"mysql://user:passwd@localhost/dbname") and will then connect*to the DB, or a PEAR::DB object link, if you already connected*the db before."If you provide nothing as $dsn, you only can later add stuff with*a pear::db-resultset or as an array. providing sql-strings will*not work.* the $root param is used, if you want to provide another name for your*root-tag than "root". if you give an empty string , there will be no*root element created here, but only when you add a resultset/array/sql-string.*And the first tag of this result is used as the root tag.** @parammixed $dsnPEAR::DB "data source name" or object DB object* @paramstring $rootthe name of the xml-doc root element.* @accesspublic*/function XML_sql2xml ($dsn = Null, $root = "root") {// if it's a string, then it must be a dsn-identifier;if {include_once ;$this->db = DB::Connect;if (DB::isError{print "The given dsn for XML_sql2xml was not valid in file ".__FILE__." at line ".__LINE__."
n";return new DB_Error($this->db->code,PEAR_ERROR_DIE);}}elseif && DB::isError{print "The given param for XML_sql2xml was not valid in file ".__FILE__." at line ".__LINE__."
n";return new DB_Error($dsn->code,PEAR_ERROR_DIE);}// if parent class is db_common, then it's already a connected identifierelseif (get_parent_class{$this->db = $dsn;}$this->xmldoc = domxml_new_xmldoc;//oehm, seems not to work, unfortunately.... does anybody know a solution?$this->xmldoc->encoding = $this->encoding_to;if {$this->xmlroot = $this->xmldoc->add_root;//PHP 4.0.6 had $root->name as tagname, check for that here...if (!isset($this->xmlroot->{$this->tagname})){$this->tagname = "name";}}}/*** General method for adding new resultsets to the xml-object*Give a sql-query-string, a pear::db_云顶娱乐送6元救济官网金 ,result object or an array as*input parameter, and the method calls the appropriate method for this*input and adds this to $this->xmldoc** @paramstring sql-string, or object db_result, or array* @parammixed additional parameters for the following functions* @accesspublic* @seeaddResult, addArray*/function add ($resultset, $params = Null){// if string, then it's a query, a xml-file or a xml-string...if ) {if (preg_match("/.xml$/",$resultset)) {$this->AddXmlFile;}elseif (preg_match("/.*select.*from.*/i" ,$resultset)) {$this->AddSql;}else {$this->AddXmlString;}}// if array, then it's an array...elseif {$this->AddArray;}if == "db_result") {$this->AddResult;}}/*** Adds the content of a xml-file to $this->xmldoc, on the same level* as a normal resultset (mostly just below )** @paramstring filename* @parammixed xpatheither a string with the xpath expression or an array with "xpath"=>xpath expressionand "root"=tag/subtag/etc, which are the tags to be inserted before the result* @accesspublic* @seedoXmlString2Xml()*/function addXmlFile{$fd = fopen;$content = fread( $fd, filesize;fclose;$this->doXmlString2Xml;}/*** Adds the content of a xml-string to $this->xmldoc, on the same level* as a normal resultset (mostly just below )** @paramstring xml* @parammixed xpatheither a string with the xpath expression or an array with "xpath"=>xpath expressionand "root"=tag/subtag/etc, which are the tags to be inserted before the result* @accesspublic* @seedoXmlString2Xml()*/

前言明日忽然想到PHP官方网站上一转,一眼就见到PHP5推出的通报。尽管在此之前见到过PHP5的预兆,但照旧留神看了PHP 5/Zend Engine 2.0新特点一文,一股JAVA气味扑面而来...特将该文试译出来,头阵于CSDN网址,以飨读者。PHP 5/Zend Engine 2.0新特色徐唤春 译 sfwebsite@hotmail.com 5引入了民用和有限支撑成员变量,它们得以定义类属性在哪天能够被访谈。例类的敬性格很顽强在艰巨辛勤或巨大压力面前不屈成员变量能在这里类的扩充类中被访谈,而个人成员变量只可以在本类中被访谈。Hello;print "MyClass::printHello(卡塔尔(قطر‎ " . $this->Bar;print "MyClass::printHello(State of Qatar " . $this->Foo;}}class MyClass2 extends MyClass {protected $Foo;function printHello(State of Qatar {MyClass::printHello(卡塔尔(قطر‎;/* Should print */print "MyClass2::printHello() " . $this->Hello; /* Shouldn't print out anything */print "MyClass2::printHello() " . $this->Bar;/* Shouldn't print */print "MyClass2::printHello() " . $this->Foo;/* Should print */}}$obj = new MyClass();print $obj->Hello;/* Shouldn't print out anything */print $obj->Bar;/* Shouldn't print out anything */print $obj->Foo;/* Shouldn't print out anything */$obj->printHello(); /* Should print */$obj = new MyClass2();print $obj->Hello;/* Shouldn't print out anything */print $obj->Bar;/* Shouldn't print out anything */print $obj->Foo;/* Shouldn't print out anything */$obj->printHello(卡塔尔;?> 私有和保养方法在PHP 5中,还引进了个体和掩护办法。例:aPrivateMethod(卡塔尔(قطر‎;}}class Bar extends Foo {public function aPublicMethod(卡塔尔 {echo "Bar::aPublicMethod(卡塔尔国called.n";$this->aProtectedMethod(卡塔尔;}}$o = new Bar;$o->aPublicMethod(卡塔尔;?> 早前代码中的客户自定义类或措施中虽未定义"public," "protected" 或 "private"等关键字,但不要求编辑就可以运转。抽象类和措施PHP 5还引进了抽象类和艺术。抽象方法只声明方法定义, 不供其实运作。包涵抽象方法的类供给证明为抽象类。例:test(卡塔尔;?> 抽象类不能够实例化。早前代码中的客商自定义类或形式中虽未定义"abstract”关键字,但无需编辑就可以运转。接口ZEND引擎2.0引进了接口。贰个类能够运维任性的接口列表。Example例: 以前代码中的顾客自定义类或形式中虽未定义"interface”关键字,但没有必要编辑就可以运行。类类型定义在保留类不要求定义类型的还要,PHP 5引进了类类型定义来声称希望把哪些类经过参数字传送递给叁个措施。Example例:a;?> 那几个类类型定义在不象一些亟待类型预订义的言语在编写翻译中张开检查,而是在运营时举行。那意味: 等价于: 本语法只用于对象或类,不适用于内建类型。finalPHP 5引入了“final”关键字定义在子类中不可能被隐瞒的成员或措施。例: 早先代码中的客户自定义类或艺术中虽未定义"final"关键字,但不必要编辑就能够运转。对象克隆PHP 4在对象被复制时,顾客无法调节拷贝的建制。在复制时,PHP 4只壹位一人地复制三个和原先对象同出一辙的复制品。大家而不是每一次都要创建一个全然相近的复制品。三个很好的内需一种复制机制的事例是,当有贰个代表三个GTK窗口的指标,它具备该窗口的有所能源,当你创立一个正片时,你或者需求贰个新的窗口,它抱有原窗口的装有属性,但须求有所新窗口的财富。其余四个事例是你有一个对象援用了其余多少个目的,当您复制父对象时,你指望树立特别引用对象的新实例,以使复制品引用它。对三个指标的正片通过调用对象的__clone(卡塔尔国方法成功:__clone(State of Qatar;?> 当开拓者伏乞构造建设多个指标的新的正片时,ZEND引擎会检查是还是不是定义了__clone(State of Qatar方法。要是未定义的话,它会调用二个暗中同意的__clone(卡塔尔方法来复制该指标的富有属性。假设定义了该措施,该方法会肩负在拷贝中安装供给的质量。为便于起见,引擎会提供叁个函数从源对象中程导弹入全数的性质,那样它就足以先获得一个具备值的源对象拷贝,只须要对急需更改的天性举办覆盖就可以。例:id = self::$id++;}function __clone() {$this->name = $that->name;$this->address = "New York";$this->id = self::$id++;}}$obj = new MyCloneable();$obj->name = "Hello";$obj->address = "Tel-Aviv";print $obj->id . "n";$obj = $obj->__clone();print $obj->id . "n";print $obj->name . "n";print $obj->address . "n";?> 统一的布局方法名ZEND引擎允许开辟者定义类的构造方法。具备布局方法的类在新建时会首先调用构造方法,布局方法适用于在正式使用该类前行行的起始化。在PHP4中,布局方法的称谓与类名相近。由于在派生类中调用父类的作法相比较普遍,因而招致在PHP4中当类在一个巨型的类世襲中开展活动时,管理方式有一点愚昧。当二个派生类被移位到一个不一样的父类中时,父类的布局方法名必然是见智见仁的,这样的话派生类中的有关调用父类构造方法的说话必要改写。PHP 5 introduces a standard way of declaring constructor methods by calling them by the name __construct(卡塔尔. PHP5引入了办法名__construct(卡塔尔国来定义结构方法。Example 为向下宽容,PHP5当在类不能找到__construct(State of Qatar方法时,会透过老的艺术也正是类名来搜索布局方法。那意味唯一可能产生宽容性难题的是在那前的代码中早就接收了多个名字为__construct(卡塔尔的主意名。析构方法定义析构方法是非凡有效的。析构方法能够记录调节和测量试验消息,关闭数据库连接,还大概有做任何的扫尾职业。PHP4中并无此体制,纵然PHP已帮助注册在倡议截止时索要周转的函数。 PHP 5 introduces a destructor concept similar to that of other object-oriented languages, such as Java: When the last reference to an object is destroyed the object's destructor, which is a class method name %__destruct(卡塔尔% that recieves no parameters, is called before the object is freed from memory. PHP5引进了与任何面向对象语言如Java语言相仿的析构方法:当最终三个该对象的援用被毁灭时,系统将会在该目的从内部存储器中放出前调用名称叫__destruct(卡塔尔国的析构方法。例:name = "MyDestructableClass";}function __destruct() {print "Destroying " . $this->name . "n";}}$obj = new MyDestructableClass(卡塔尔国;?> 和布局方法肖似,引擎将不调用父类的析构方法,为调用该形式,你要求在子类的析构方法中通过parent::__destruct(卡塔尔(قطر‎语句实行调用。常量PHP 5 引入了类常量定义: PHP5允许常量中有表明式,但在编写翻译时常量中的表达式将被总括.,由此常量无法在运行中改动它的值。 早前代码中的客户自定义类或艺术中虽未定义"const”关键字,但无需编辑就可以运营。例外PHP 4 had no exception handling. PHP 5 introduces a exception model similar to that of other programming languages. PHP4中无例外管理,PHP5引用了与任何语言相仿的分化处理模型。例:getMessage(卡塔尔国;}?> 从前代码中的顾客自定义类或情势中虽未定义'catch', 'throw' 和 'try'关键字,但不供给编辑即可运维。函数重回对象值In PHP 4 it wasn't possible to dereference objects returned by functions and make further method calls on those objects. With the advent of Zend Engine 2, the following is now possible: 在PHP4中,函数不大概回到对象的值并对回到的靶子进行艺术调用,通过ZEND引擎第22中学,那整个变得恐怕: 静态类中的静态成员变量今后可起先化Example 静态方法PHP5引入了首要字'static'来定义三个静态方法,那样可以从指标外举行调用。例: 虚构变量$this在静态方法中没用。instanceofPHP5引入了重大字instanceof来规定三个对象是不是是某贰个对象的实例,或某多个指标的派生,或选拔了某二个接口。例: 静态函数变量全部的静态变量现在在编写翻译时张开管理,那允许开辟者通过援用来钦定静态变量。那么些变化进步了效能但象征异常的小概对静态变量举行间接援引。函数中经过按地址传送方式的参数允许定义私下认可值例: __autoload(卡塔尔国在初阶化一个未定义的类时,引擎将自动调用__autoload(卡塔尔国拦截器函数。该类新秀作为__autoload(State of Qatar拦截器函数独一参数字传送递给它。例: 方法和本性调用的重载通用 __call方法能够开展艺术和性质调用的重载。例: __get 1, "b" => 2, "c" => 3);function __get {print "Getting [$nm]n";if {$r = $this->x[$nm];print "Returning: $rn";return $r;} else {print "Nothing!n";}}function __set {print "Setting [$nm] to $valn";if {$this->x[$nm] = $val;print "OK!n";} else {print "Not OK!n";}}}$foo = new Setter();$foo->n = 1;$foo->a = 100;$foo->a++;$foo->z++;var_dumpx;}}$foo = new Caller();$a = $foo->test;var_dump;?>

Pinging
"; $to_ping = "dtheatre.com"; $count = 3; $psize = 65; echo " Please be patient, this can take a few moments...n

文件一、Listtable.php

  1. 在风马牛不相干的论坛贴出你的难题 2. 在研究高档技术的论坛张贴非常初级的主题材料;反之亦然 3. 在太多的差异新闻组交叉张贴 ---------------------------- 用辞贴切,语法精确,拼写准确 ---------------------------- 我们从经历中发觉,马虎的写作者平时也是麻痹大意的思虑者。 回答大意肌窒碍概者的标题特不值得,我们宁可把时光耗在别处。 准确的拼写,标点符号和分寸写很要紧。 更相仿的说,借让你的咨询写得象个半文盲,你很有希望被忽视。 固然你在运用非母语的论坛提问,你能够犯点拼写和语法上的小错--但一定不能够在思忖上马虎 ---------------------------- 使用含义丰盛,描述无误的标题

"; flush { ?>

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