Integrating PHP and Perl
Perl is a language often associated with text processing and CGI. PHP is
a language often associated with dynamic Web pages. Both are very popular
with Web developers. Often, each of these languages is used at the expense of
the other. Hard-core Perl developers would love to develop everything in
Perl, and PHP developers tend to stick with PHP.
As usual in the Open Source
world, there is a lot of zealotry between users of each language. If you
think that one of these languages is perfect and the other is lame,
this article is not for you! This article is for those who take a more
pragmatic approach and use what works best for them. Each language has
its strengths and limitations. Personally, I use both languages at work
and at home. With time, I have discovered which language is best for which
tasks and
try to integrate the strengths of each language as much as possible to
complete my work quickly.
Perl is extremely good at
system administration and extensive data processing, among other
things. This means, if you want to do some extensive processing on a text
report, Perl would be preferable, as it provides handy
regular-expression-enabled text comparisons, which make it so much easier to
search through a report. Perl also has extensive string manipulation
features. Perl, by virtue of being older than PHP and having an extensive
community, has thousands of extensions archived in CPAN, which allow
one to do virtually anything with the language, conveniently. from XML
processing to writing to parallel port devices, CPAN includes
everything. CPAN is the reason Perl continues to be useful to a
large number of developers to date. Although it is not impossible to do
everything described here with PHP and a mixture of other languages, it's
simply more convenient with
Perl.
PHP is extremely good at integration with Web pages and databases. PHP
integrates nicely with static HTML Web pages. That's why it's so
popular and has
相关文档：
PHP概述：
php是Hypertext Preprocessor(超文本预处理器)的缩写，是一种服务器端、跨平台、HTML嵌入式的脚本语言，其独特的语法混合了C语言、Java语言和Perl语言的特点，是一种被广泛应用的开源式的多用途脚本语言，
尤其适合web开发。php是b/s体系结构，属于三层结构。服务启动后，用户不用相应客户端软件，只用浏览器浏 ......
单引号'和双引号"的区别：
首先是单引号要比双引号执行效率要高，因为双引号会对内容进行预处理。
例如：'$value' 输出字符 $value ; "$value"输出变量$value的值。
char和varchar的区别：
char是定长而varchar是变长，char的主要特点是存储方式预分配，varchar当它的数据长度发生变化时会� ......
php中set_include_path函数用法：
php中的set_include_path函数可用于设置应用程序目录,开发项目时合理应用这些函数,不但可以让我们在include时不用一层一层的计算目录,还可以提高我们开发的效率,减少文件包含错误率.
例如：
简历2个php文件,一个目录
位置结构如下
/index.php
/include/config.php
index.php ......
常用PHP运算类型介绍与应用
1、算术运算
例：
5 * 6 - 12
2*(28+1)
注：算术运算遵循数学运算规则
从左到右，先算乘除后算加减，遇到括号先算括号内
2、赋值运算
例：
$a=1;
$a+=2;
$a*=3;
......
在学习php时，看到的，做个笔记
字符串头部：^
<?php echo ereg(“^hello”,”hello world!”); ?>
字符串尾部：$
<?php echo ereg(“bye$”,”goodbye”); ?>
任意的单个字符：.
<?php echo ereg(“.”,”goodbye”); ......
