What is the usage of PHP?

Usage of PHP

PHP is a general open source scripting language. It is a scripting language executed on the server side. It is similar to C language. It is a commonly used website programming language. The language's unique syntax mixes C, Java, Perl and PHP's own syntax. It is mainly suitable for the field of web development.

Main features

(1) Open source and free nature

Due to the source of the PHP interpreter The code is public, so websites with higher security factors can change the PHP interpreter themselves. In addition, the use of the PHP runtime environment is also free. [1]

(2) Quickness

PHP is a language that is very easy to learn and use. Its grammatical features are similar to C language, but not as complicated as C language. Address operation, and the addition of object-oriented concepts, coupled with its concise syntax rules, make it very simple to operate and edit, and highly practical.

(3) Extensibility of database connections

PHP can establish connections with many mainstream databases, such as MySQL, ODBC, Oracle, etc. PHP uses different compiled functions to establish connections with these databases For connection purposes, PHPLIB is a commonly used base library provided for general transactions.

(4) Use process-oriented and object-oriented together

In the use of PHP language, you can use process-oriented and object-oriented respectively, and you can mix PHP process-oriented and object-oriented together. , which is something that many other programming languages ​​cannot do.

Advantages

(1) Popular and easy to use

PHP is currently the most popular programming language, there is no doubt about it. It drives more than 200 million websites around the world, and more than 81.7% of the world's public websites use PHP on the server side. PHP's commonly used data structures are all built-in. It is convenient and simple to use, not complicated at all, and its expression ability is quite flexible.

(2) There are many development positions

In server-side website programming, PHP will more easily help you find a job. Many Internet-related companies are using the PHP development framework, so it can be said that the market demand for PHP development programmers is still relatively large.

(3) Still developing

PHP is constantly compatible with technologies such as closures and namespaces, while taking into account performance and currently popular frameworks. After version 7, it has been providing higher performance applications.

(4) Strong implantability

During the patch vulnerability upgrade process of PHP language, the core part of the PHP language is easy to implement and fast to implant.

(5) Strong scalability

During the database application process, the PHP language can retrieve various types of data from the database and has high execution efficiency.

Disadvantages

(1) PHP’s interpretation and operation mechanism

In PHP, all variables are page-level, whether they are global variables , or static members of the class, will be cleared after the page is executed.

(2) Design flaws and lack of attention PHP is called an opaque language because there is no stack trace and various fragile inputs. There is no clear design philosophy. Early PHP was influenced by Perl, the standard library with out parameters was introduced from the C language, and the object-oriented part was learned from C and Java.

(3) Poor support for recursion

PHP is not good at recursion. The limit on the number of recursive functions it can tolerate is significantly smaller than that of other languages.

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