PHP (foreign name: PHP: Hypertext Preprocessor, Chinese name: "Hypertext Preprocessor") is a general open source scripting language. The syntax absorbs the characteristics of C language, Java and Perl, which is easy to learn and widely used. It is mainly suitable for the field of Web development.
#PHP's unique syntax mixes C, Java, Perl and PHP's own syntax. It can execute dynamic web pages faster than CGI or Perl. Compared with other programming languages, dynamic pages made with PHP embed programs into HTML (an application under the Standard Universal Markup Language) document for execution, and the execution efficiency is much higher than CGI that completely generates HTML tags; PHP can also execute compiled code. Compilation can achieve encryption and optimize code running, making the code run faster.
What are the advantages of using functions in PHP?
1. Make the code logic clearer;
2. Avoid too many global variables;
3. After encapsulation, avoid duplication of code with the same logic, just call and write function;
4. Easy to maintain, only need to modify the function logic to complete all logic modifications that call the function, no need for multiple modifications.
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