PHP入门教程之变量命名规则
在学习开发时我们有必要知道了些常识,如变量命名规则是一个很重要的习惯了,如果你养成好的变量命名习惯以后和你合作的团队就会更容易接受你。
1.类命名
(1)使用camel命名法(这个几乎所有语言通用)
(2)尽量少于3个词
(3)缩写词也不要全部使用大写字母。eg:使用GetHtmlStatic, 而不使用GetHTMLStatic。
2.函数和方法命名
通常每个方法和函数都执行一个动作,所以对它们的命名应该清楚地说明它们的用途。
eg:用CheckForErrors()代替ErrorCheck(),用DumpDataToFile代替DataFile().
3.类属性命名
属性命名应该以字符"m" 为前缀。前缀”m“后采用于类命名一致的规则。
eg: var mVar;
4.变量命名
使得所有的变量在代码中看起来都不同,容易辨认。
局部变量命名:所有字母都使用小写,使用 ”_“ 作为每个词的分界
eg:$time_of_error
全局变量命名:带前缀 "g"
eg: global $gLog;
静态变量命名:带前缀 "s"
eg: static $msStatics = 0;
引用变量命名:带前缀 ”r“
eg: var mrStatus;
string,字符串型,在变量前面加str
代码如下 | 复制代码 |
//下面一个变量为字串型 $strMessage = Hello World! ; //下面一个变量为一维数组 //下面一个变量为整数
$rsConn = mysql_connect ( localhost , user , pw ) ; |
未明变量,使用mx
代码如下 | 复制代码 |
$mxData = getData() ; |
自定义函数,使用fn_开头
代码如下 | 复制代码 |
function fn_HaltError ( $strErrorMessage ) { // do sth... } |
一个综合的例子(使用分页类):
代码如下 | 复制代码 |
include ( "lib/BluePage.class.php" ) ; $rsConn = mysql_connect( localhost , root , 123456 ) or d $strQuery = "SELECT COUNT(`id`) FROM test" ; //分页数组与html // 分页数据里包含有offset,取数据 |

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Dreamweaver CS6
Visual web development tools
