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title | localeTitle |
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Basic Syntax | 基本语法 |
基本语法
PHP脚本可以放在文档中的任何位置。
PHP脚本以<?php
开头,以?>
结尾
下面,我们有一个简单的PHP文件示例,其中一个PHP脚本使用内置的PHP函数“echo”来输出文本“Hello World!”。在网页上
````
我的第一个PHP页面
The output of that would be :
我的第一个PHP页面
你好,世界!
#### Note: PHP statements end with a semicolon (;).
# Comments in PHP
PHP supports several ways of commenting:
# PHP Case Sensitivity
In PHP, all keywords (eg if, else, while, echo, etc.), classes, functions, and user-defined functions are NOT case-sensitive.
In the example below, all three echo statements below are legal (and equal):
### However; all variable names are case-sensitive.
In the example below, only the first statement will display the value of the $color variable (this is because $color, $COLOR, and $coLOR are treated as three different variables):
````