php basic syntax

PHP basic syntax:

* 1. Tag: start with end with tag. If it is a pure PHP code script, the end tag should be omitted

* 2. Statement: Each statement must end with a semicolon;, the last statement can be omitted, but it is recommended to add a semicolon

* 3. Comment: Exactly the same as javascrpt, multiple lines Use:\/*Content*\/, use in a single line: //or #(linux style)

* 4. Function: PHP (Hypertext Preprocessor), translated as: Hypertext Preprocessor

* What is hypertext? It is actually an .html file. The PHP language is essentially used to create html files.

<?php
echo &#39;<h2 style="color: #F00">Hello World~~</h2>&#39;;
?>