php 单例模式有什么缺点

PHP：超文本预处理器 (PHP: Hypertext Preprocessor )

PHP is an abbreviation of Hypertext Preprocessor, earlier called Personal Home Page. PHP is extensively used HTML-embedded, open-source server-side scripting language created and designed for web development and it is also used as a general-purpose programming language. In 1994, It was developed by Rasmus Lerdorf and in 1995, it was introduced in the market. Most of the syntax of PHP is borrowed from C, C++, and Java.

PHP是Hypertext Preprocessor的缩写 ，以前称为Personal Home Page 。 PHP是为Web开发创建和设计的，广泛使用的嵌入HTML的开放源代码服务器端脚本语言，并且它还用作通用编程语言。 1994年，它由Rasmus Lerdorf开发，并在1995年推向市场。 PHP的大多数语法都是从C，C ++和Java借用的。

PHP codes are easily assorted with HTML codes and can be used in a mixture with diverse web substructures. On the server, its scripts are implemented. PHP interpreter is used to perform operations on PHP codes. The primary aim of PHP is to enable web developers to develop dynamically created web pages promptly.

PHP代码很容易与HTML代码搭配使用，并且可以与各种Web子结构混合使用。 在服务器上，其脚本已实现。 PHP解释器用于对PHP代码执行操作。 PHP的主要目的是使Web开发人员能够Swift开发动态创建的网页。

A PHP file comprised of texts, HTML tags and scripts with which it also comprises a file extension of .php, .php3, or .phtml. A user can create a login page, design a form, and create forums, dynamic and static websites and many more functions with PHP.

一个由文本，HTML标记和脚本组成的PHP文件，该文件还包括.php ， .php3或.phtml的文件扩展名。 用户可以使用PHP创建登录页面，设计表单以及创建论坛，动态和静态网站以及更多功能。

PHP的主要功能 (Key features of PHP)

• Hypertext Preprocessor is the full form of abbreviated term PHP.

  超文本预处理器是缩写词PHP的完整形式。

• PHP is an open-source server-side scripting language like ASP.

  PHP是类似于ASP的开源服务器端脚本语言。

• Diverse databases like MySQL, Oracle, Sybase, Solid, PostgreSQL, Informix, etc. are supported by PHP.

  PHP支持MySQL，Oracle，Sybase，Solid，PostgreSQL，Informix等各种数据库。

• PHP is free to download and use for web development, GUI applications, etc.

  可免费下载PHP并将其用于Web开发，GUI应用程序等。

PHP的优点 (Advantages of PHP)

1. Cost is free:

   费用免费 ：

   PHP is an open-source language and all its elements, functions and features are free to use and distribute.

   PHP是一种开源语言，其所有元素，功能和特性均可免费使用和分发。

2. Platform independent:

   平台无关 ：

   PHP is platform-independent and can be operated, processed and functioned on all significant operating systems.

   PHP是独立于平台的，并且可以在所有重要的操作系统上进行操作，处理和运行。

3. Compatible:

   兼容的

   PHP's compatibility with almost all servers is satisfied and is used in these days.

   目前，PHP与几乎所有服务器的兼容性都得到了满足和使用。

4. Secure:

   安全 ：

   The security of PHP has leveled in multiple layers to prevent threats and other malevolent attacks.

   PHP的安全性已在多个层次上进行了分级，以防止威胁和其他恶意攻击。

5. Easy to learn:

   简单易学 ：

   The syntax of PHP is very easy, simple and understandable. Its codes are fundamentally based on C, C++, and HTML-embedded. So because of that, it makes it easier to learn simply for a programmer.

   PHP的语法非常容易，简单且易于理解。 它的代码基本上基于C，C ++和HTML嵌入式。 因此，这样一来，对于程序员来说，更容易学习。

PHP的缺点 (Disadvantages of PHP)

1. Security:

   安全性 ：

   Anyone can see the source code of PHP because its open-sourced and through bugs, it can be used by anyone to traverse the weakness of it.

   任何人都可以看到PHP的源代码，因为它是开源的，并且可以通过bug来供任何人用来克服它的弱点。

2. Not satisfactory for large applications:

   对于大型应用程序不满意 ：

   Huge applications developed out of the programming language will be strenuous to support because the programming language is not extremely modular.

   用非编程语言开发的大量应用程序将竭力支持，因为该编程语言不是非常模块化的。

3. Error Handling Method is poor:

   错误处理方法不佳 ：

   The framework or substructure has a substandard error handling method.

   框架或子结构具有次标准的错误处理方法。

翻译自: https://www.includehelp.com/dictionary/php-full-form.aspx

php 单例模式有什么缺点