What are PHP Namespaces? What are Namespaces in general? A Layman answer with an example would be great. Namespacing does for functions and classes what scope does for variables. It allows you to use the same function or class name in different parts of the same program without causing a name collision. In simple terms, think of a namespace as a person's surname . If there are two p
什么是PHP命名空间? 通常命名空间是什么? 以一个例子作为一个外行人的答案会很好。 命名空间为函数和类提供了变量的作用域。 它允许您在同一程序的不同部分使用相同的函数或类名,而不会导致名称冲突。 简单来说, 把名字空间想象成一个人的姓氏 。 如果有两个人叫“约翰”,你可以用他们的姓氏来区分他们。 情景 假设您编写使用名为output()的函数的应用程序。 您的output()函数将获取页面上的所有HTML代码并将
Reading about Kohana templates and saw something I've never seen before: $this->template->title = __('Welcome To Acme Widgets'); What does __('Text') mean? What is it? What does it do? In Kohana (version 3) the function is defined in system/base.php and is a convenience function to aid (as the other answers have mentioned) internationalization. You provide a string (with,
阅读关于Kohana模板并看到我从未见过的东西: $this->template->title = __('Welcome To Acme Widgets'); __('Text')是什么意思? 它是什么? 它有什么作用? 在Kohana(版本3)中,函数是在system / base.php中定义的,并且是一种便利功能,用于帮助(如其他答案所述)国际化。 您提供一个字符串(可选地,有些占位符将值替换为完成的文本),然后解释该字符串,并在必要时返回翻译。 与其他答案中的假
The path in require and require_once is like (dir1/dir2/test.php). Can we create objects the same like $obj= new class1/class2; ? If yes, please explain. http://php-fedex-api-wrapper.googlecode.com/svn/trunk/htdocs/example1.php $rateRequest = new ComplexTypeRateRequest(); It is not using the path, it is using the namespace ( ComplexType ); a feature built-into PHP 5.3. More Info: ht
require和require_once中的路径就像(dir1 / dir2 / test.php)。 我们可以创建与$obj= new class1/class2;相同的对象吗$obj= new class1/class2; ? 如果是,请解释。 http://php-fedex-api-wrapper.googlecode.com/svn/trunk/htdocs/example1.php $rateRequest = new ComplexTypeRateRequest(); 它不使用路径,它使用名称空间( ComplexType ); 一个内置于PHP 5.3的功能。 更多信息: http://php.net/manual/en
I was developing a site using Laravel 4. I had this piece of code in one of my models: class MyModel extends Eloquent { protected $var = array( "label" => Lang::get("messages.label"), "code" => "myCode", ); ... } But I gave this syntax error on the line where I used Lang::get : syntax error, unexpected '(', expecting ')' Then I changed my code into this: cla
我正在使用Laravel 4开发一个站点。我在我的一个模型中使用了这段代码: class MyModel extends Eloquent { protected $var = array( "label" => Lang::get("messages.label"), "code" => "myCode", ); ... } 但是我在使用Lang::get的行上给出了这个语法错误: syntax error, unexpected '(', expecting ')' 然后我改变了我的代码: class MyModel extends Eloquent { protected $var
I am expecting this to be a basic syntax error I overlooked, but I can't figure it out. In a PHP script, I keep getting the following error. Parse error: syntax error, unexpected T_VARIABLE, expecting T_FUNCTION in [path]/scripts/users/database_connection.php on line 4 This occurs when my script to connect to the database is called with an include_once() . I stripped my script down to th
我期待这是一个我忽略的基本语法错误,但我无法弄清楚。 在PHP脚本中,我不断收到以下错误。 Parse error: syntax error, unexpected T_VARIABLE, expecting T_FUNCTION in [path]/scripts/users/database_connection.php on line 4 发生这种情况时,我的脚本连接到数据库与include_once()调用。 我将脚本剥离为最基本的代码(留下了其他代码所要求的代码),并且仍然调用此错误。 <?php class UserDatabaseConnecti
I get this PHP error: Parse error: syntax error, unexpected T_VARIABLE From this line: $list[$i][$docinfo['attrs']['@groupby']] = $docinfo['attrs']['@count']; Is there anything wrong with this line? There might be a semicolon or bracket missing a line before your pasted line. It seems fine to me, every string is allowed as array index. It could be some other line as well, PHP is not al
我得到这个PHP错误: 解析错误:语法错误,意外的T_VARIABLE 从这一行开始: $list[$i][$docinfo['attrs']['@groupby']] = $docinfo['attrs']['@count']; 这条线有什么问题吗? 在粘贴的行之前可能有一个分号或括号缺少一行。 对我来说似乎很好,每个字符串都可以作为数组索引。 它也可能是其他一些行,PHP并不总是那么确切。 可能你只是在前一行丢失了一个分号。 如何重现这个错误,把它放在一个名为a.php的文件
What are the differences between htmlspecialchars() and htmlentities() . When should I use one or the other? From the PHP documentation for htmlentities: This function is identical to htmlspecialchars() in all ways, except with htmlentities() , all characters which have HTML character entity equivalents are translated into these entities. From the PHP documentation for htmlspecialchars:
htmlspecialchars()和htmlentities()之间有什么区别。 我应该什么时候使用其中一种? 来自htmlentities的PHP文档: 这个函数与htmlspecialchars()在所有方面都是相同的,除了htmlentities() ,所有具有HTML字符实体等价物的字符都被转换为这些实体。 从htmlspecialchars的PHP文档: 某些字符在HTML中有特殊意义,如果要保留它们的含义,应该用HTML实体表示。 该函数返回一个字符串,其中包含一些转换; 翻译是对日常网
I am converting a PHP 5.3 library to work on PHP 5.2. The main thing standing in my way is the use of late static binding like return new static($options); , if I convert this to return new self($options) will I get the same results? What is the difference between new self and new static ? will I get the same results? Not really. I don't know of a workaround for PHP 5.2, though. Wh
我正在将PHP 5.3库转换为PHP 5.2。 以我的方式站在主要地位的是使用迟的静态绑定,如return new static($options); ,如果我将其转换为return new self($options)我会得到相同的结果吗? new self和new static什么区别? 我会得到相同的结果吗? 不是真的。 不过,我不知道PHP 5.2的解决方法。 new self和new static什么区别? self指实际写入new关键字的同一类。 static ,在PHP 5.3的后期静态绑定中,指的是您
In PHP: When should I use require vs. include ? When should I use require_once vs. include_once ? There are require and include_once as well. So your question should be... When should I use require vs. include ? When should I use require_once vs. require The answer to 1 is described here. The require() function is identical to include(), except that it handles errors differently.
在PHP中: 我应该何时使用require和include ? 什么时候应该使用require_once和include_once ? 还有require和include_once 。 所以你的问题应该是...... 我应该何时使用require和include ? 何时应该使用require_once与require 这里介绍1的答案。 require()函数与include()相同,只是它以不同的方式处理错误。 如果发生错误,include()函数将生成警告,但脚本将继续执行。 require()生成一个致命错误
This question already has an answer here: What's the difference between :: (double colon) and -> (arrow) in PHP? 6 answers :: is for static elements while -> is for instance elements. For example: class Example { public static function hello(){ echo 'hello'; } public function world(){ echo 'world'; } } // Static method, can be called from the class name Example:
这个问题在这里已经有了答案: PHP中的:(双冒号)和 - >(箭头)有什么区别? 6个答案 ::是为静态元素,而->为例如元素。 例如: class Example { public static function hello(){ echo 'hello'; } public function world(){ echo 'world'; } } // Static method, can be called from the class name Example::hello(); // Instance method, can only be called from an instance of the class