Official version of php common classes

I wrote 4 php classes myself, share them with me, the code is relatively stupid, experts should not use it, hehe class: file.php file upload class html.php generate static page class mysqlclass.php database operation class page_class.php paging processing class PhpPHP It is an HTML embedded language, a scripting language embedded in HTML documents that is executed on the server side. The style of the language is similar to the C language and is widely used. Language analysis 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 documents for execution, and the execution efficiency is much higher than CGI that completely generates HTML tags; PHP can also execute compiled code, and the compilation can Achieve encryption and optimize code running, making the code run faster.