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php基础教程笔记

很久就知道php,但是一直没时间去学习,现在开始要好好学习php,希望有一天从c#的繁琐解脱出来,走向php的简洁明了。就一项开发环境的庞大就够我麻烦,每次装机都要装一遍vs,sql。

php的环境搭建很简单,因为我走了一个捷径,网上下载了wamp service 2.5,官方网址http://www.wampserver.com/,有32位和64位的,必须下载跟系统一致的版本,不然会出现奇怪的错误,这个耽误了我很长时间。

学习语言当然需要书籍,在网上找到一个电子版的php基础教程4,非常适合php新手学习,以下是我的学习笔记,记录下来供以后参看,也是对自己的督促。

一、实现输出hello world的几种方法

<?php echo "hello world!";
print "hello world!";
print_r("hello world!");
eval("echo \"hello world\";")<br>?>

echo可以一次输出多个值。echo是语言结构(language construct),而并不是真正的函数。

print()只适用于标量类型如数字和字符串,如果字符串成功显示则返回true,否则返回false。

print_r()可以把字符串和数字简单地打印出来,而数组则以括起来的键和值得列表形式显示,并以Array开头。

eval()函数会执行字符串中的php代码。

1楼yangtoude
你好,我也正在学习php。交个朋友吧~
Re: 天晴就快乐
@yangtoude,我刚接触呢,相互学习吧
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