45 lines
1.0 KiB
Markdown
45 lines
1.0 KiB
Markdown
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---
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title: Basic Syntax
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localeTitle: 基本语法
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---
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# 基本语法
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PHP脚本可以放在文档中的任何位置。
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PHP脚本以`<?php`开头，以`?>`结尾
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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
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\`\`\`\`
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# 我的第一个PHP页面
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```
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The output of that would be :
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```
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我的第一个PHP页面
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你好，世界！
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```
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#### Note: PHP statements end with a semicolon (;).
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# Comments in PHP
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PHP supports several ways of commenting:
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```
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```
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# PHP Case Sensitivity
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In PHP, all keywords (eg if, else, while, echo, etc.), classes, functions, and user-defined functions are NOT case-sensitive.
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In the example below, all three echo statements below are legal (and equal):
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```
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```
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### However; all variable names are case-sensitive.
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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):
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```
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\`\`\`\`
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