Difference between :: and

Possible Duplicate: What's the difference between :: (double colon) and -> (arrow) in PHP? Reference - What does this symbol mean in PHP? I'm quite decent with PHP, but only procedural. So I decided to venture forth into learning object oriented. I'm getting the hang of it, and liking it quite well. On PHP.net, I've always seen object oriented as mysqli::query . Howev

::和之间的区别

可能的重复: PHP中的:(双冒号)和 - >(箭头)有什么区别? 参考 - 这个符号在PHP中的含义是什么? 我对PHP很满意,但只有程序。 所以我决定开始学习面向对象。 我已经掌握了它,并且非常喜欢它。 在PHP.net上,我总是将面向对象看作mysqli::query 。 但是,我见过的每个示例都使用mysqli->query以及我一直使用的方法。 今天,我遇到了实际看到::在一个类的例子中使用。 所以现在,我的问题是, ::和->

> and ::

Possible Duplicate: In PHP, whats the difference between :: and ->? In PHP, what is the main difference of while calling a function() inside a class with arrow -> and Scope Resolution Operator :: ? For more clearance, the difference between: $name = $foo->getName(); $name = $foo::getName(); What is the main profit of Scope Resolution Operator :: ? $name = $foo->getName(); Th

>和::

可能重复: 在PHP中,::和 - >有什么区别? 在PHP中,使用箭头->和范围解析运算符::在类内调用函数()时,主要区别是什么? 为了获得更多许可,以下几点之间的差异: $name = $foo->getName(); $name = $foo::getName(); 范围解析操作符的主要利润是什么:: ? $name = $foo->getName(); 这将调用对象$foo的成员或静态函数 $name = $foo::getName(); 将调用$foo类的静态函数。 如果你想称之为“利润”,

Determine if the store is open?

In PHP and MySQL - how to determine if the Store is Open or Close (return true or false)? Also how to get the next opening hours if the store is closed? Example of Opening_Hours table: +----+---------+----------+-----------+------------+---------+ | id | shop_id | week_day | open_hour | close_hour | enabled | +----+---------+----------+-----------+------------+---------+ | 1 | 1 |

确定商店是否开放?

在PHP和MySQL中 - 如何确定商店是打开还是关闭(返回true或false)? 如果商店关闭,如何获得下一个营业时间? Opening_Hours表的例子: +----+---------+----------+-----------+------------+---------+ | id | shop_id | week_day | open_hour | close_hour | enabled | +----+---------+----------+-----------+------------+---------+ | 1 | 1 | 1 | 16:30:00 | 23:30:00 | 1 | | 2 | 1

Is PHP thread

Is PHP (as of 5.2) thread-safe on Linux/UNIX? Would it be possible to use it with Apache Worker-MPM or Event-MPM? The facts I gathered so far are inconclusive: Default binaries included in most distributions have ZTS disabled, so I'm aware, that I'd have to recompile them. In theory Zend Engine (core PHP) with ZTS enabled is thread-safe. It's said that some modules might not

是PHP线程

PHP(截至5.2)在Linux / UNIX上是线程安全的吗? 是否有可能将它与Apache Worker-MPM或Event-MPM一起使用? 我迄今收集的事实是不确定的: 包含在大多数发行版中的默认二进制文件都禁用了ZTS,所以我知道我必须重新编译它们。 理论上讲,启用ZTS的Zend Engine(核心PHP)是线程安全的。 据说有些模块可能不是线程安全的,但是我还没有找到任何模块的列表。 PHP FAQ的状态与上述非常相似。 你有什么经验? 这不

PHP null coalesce + ternary operators strange behavior

I'm facing unexpected behavior when using new PHP7 null coalesce operator with ternary operator. Concrete situation(dummy code): function a() { $a = 1; $b = 2; return $b ?? (false)?$a:$b; } var_dump(a()); The result is int(1). Can anybody explain me why? Your spaces do not reflect the way php evaluates the expression. Note that the ?? has a higher precedence than the te

PHP null coalesce +三元运算符奇怪的行为

使用三元运算符使用新的PHP7空合并运算符时,我遇到了意外的行为。 具体情况(虚拟代码): function a() { $a = 1; $b = 2; return $b ?? (false)?$a:$b; } var_dump(a()); 结果是int(1)。 有人可以解释我为什么吗? 你的空间不反映php评估表达式的方式。 请注意?? 比三元表达式具有更高的优先级。 你会得到以下结果: ($b ?? false) ? $a : $b; 只要$b不为null或者计算结果为false它就是$a 。

What is the 'Null coalesce' (??) operator used for?

With the release of a new PHP version, PHP 7, new features are introduced. among these new features is an operator I am not familiar with. The Null coalesce operator . What is this operator and what are some good use cases? You can use it to init a variable that might be null The ?? operator is called the null-coalescing operator. It returns the left-hand operand if the operand is not n

什么是'空合并'(?)运算符用于?

随着新的PHP版本PHP 7的发布,引入了新功能。 这些新功能中有一位是我不熟悉的操作员。 Null coalesce operator 。 这个操作符是什么,有什么好的用例? 您可以使用它来初始化一个可能为空的变量 ?? ?? 运算符称为空合并运算符。 如果操作数不为null,则返回左侧的操作数; 否则返回右手操作数。 来源:https://msdn.microsoft.com/nl-nl/library/ms173224.aspx (不依赖于语言) 用例 你可以写 $rabbits; $

Strange behaviour of rawurlencode() ...how to get it to work?

I found quite annoying thing in my PHP project. My webpage can store files, and then enable users to download/show them. For that means I have made URL links (following to model classes handling the name of file and providing it, all works here) But with files there comes the problem with their names, expecially spaces and special characters (which are quite common in language of the site).

rawurlencode()的奇怪行为...如何让它工作?

我在我的PHP项目中发现了一件非常烦人的事情。 我的网页可以存储文件,然后让用户下载/显示它们。 为此,我已经建立了URL链接(模型类处理文件名并提供它,这里的所有作品) 但是对于文件来说,它们的名字带有问题,尤其是空格和特殊字符(这在网站的语言中很常见)。 我的系统通过单击链接提供文件名称(下载脚本杀死所有的盗链尝试,因此只有可点击的链接才能完成这项工作)。 所以我遇到了处理这些特殊文件名称的问题

path behaviour not working as expected

I've just moved a load of sites to a new VPS and have a strange problem with include_path. It's something that worked fine on the old server but not on the new. I'll try and explain it using a simple example... In /home/kin/www/lib/Zend and also in /home/kin/www/ipb/_membadmin/Zend there is a file called test1.php which simply echoes which folder it is in. In /home/kin/www/ipb/

路径行为不按预期工作

我刚刚将一大堆网站移到了新的VPS上,并且在include_path上有一个奇怪的问题。 这在旧服务器上运行良好,但不在新服务器上运行。 我会尝试用一个简单的例子来解释它... 在/home/kin/www/lib/Zend以及/home/kin/www/ipb/_membadmin/Zend有一个名为test1.php的文件,它简单地回显了它所在的文件夹。 在/home/kin/www/ipb/_membadmin有一个名为test.php的文件它有一行.... require_once 'Zend/test1.php'; 当你运行它时,

Cannot use invoke magic method within another object

I have experienced something that I think it's a bug, but I'm not sure. So I come here to ask to the people who know more about this than me, is this a PHP bug? Look at the following lines: <h1>Tests</h1> <?php class Foo { public function __invoke() { return 'Called correctly'; } } class Boo { public function __construct() { $this->Foo

不能在另一个对象中使用invoke magic方法

我经历过一些我认为是错误的东西,但我不确定。 所以我来这里问问那些比我更了解这些的人,这是一个PHP错误吗? 看看以下几行: <h1>Tests</h1> <?php class Foo { public function __invoke() { return 'Called correctly'; } } class Boo { public function __construct() { $this->Foo = new Foo(); } } $Foo = new Foo(); echo $Foo(); echo "<br><br

Why is this Getter and Setter behaving like this?

I recently came across this code question and am very unclear as to why it is producing these results. Class Magic { public $a ="A"; protected $b = array( "a"=>"A", "b"=>"B", "c"=>"C"); protected $c = array(1,2,3); public function __get($v ) { echo "$v,"; return $this->b[$v]; //internal so fine with protected. } public function __set($var, $val ) {

为什么这个Getter和Setter的行为如此呢?

我最近遇到了这个代码问题,我很不清楚为什么它会产生这些结果。 Class Magic { public $a ="A"; protected $b = array( "a"=>"A", "b"=>"B", "c"=>"C"); protected $c = array(1,2,3); public function __get($v ) { echo "$v,"; return $this->b[$v]; //internal so fine with protected. } public function __set($var, $val ) { echo "$var: $val,"; $this->$va