PHP3 入门教程初窥门径
PHP3.0 语句能够很容易地插入到 HTML 中,这为实现动态设计提供了一个很方便的途径。比如,如果想要把当前的日期添加到 HTML 文件中,我们可以这样做:
Our first PHP3.0 script
我的第一个 PHP3.0 脚本
/* 上面的 "标明从这儿开始就是 PHP 脚本了 */
$today = date("Y-m-d");
PRINT " 今天是 : $today. /CENTER>";
# 后面的 "?>" 表示脚本结束
?>
假设今天的日期是 1 月 20 号, 2000 年,那么就会有如下显示:
我的第一个 PHP3.0 脚本
今天是 : 2000-01-20
看了这段脚本,来一个小小的总结:
1. 所有的 PHP3.0 语句都必须在 " 2. 在脚本中可以加注释。可以用 "/*" 和 "*/" 来注释一段话,或者用在行的前面加上 "#" 来注释掉这一行。
3. 如果要在屏幕上输出结果,就要用到 PRINT 语句,输出的内容应该用双引号 (") 括起来。
4. 每条 PHP3.0 语句都以分号 (;) 来结束。 .
5. 任何在 PRINT 中的 HTML 语句都会被客户浏览器来解释输出。
6. 包含有 PHP 语句的文件,只有用后缀 *.php3 命名后(比如: myphpfile.php3 )才能够被 PHP3.0 的解释器所识别并进行相应的处理。
7. date() 函数的使用方法如下:
语法: : string date(string format, int timestamp);
这个函数可以有两个参数, timestamp 参数是可选的,如果没有 timestamp 参数,则使用当前时间。然后函数根据给出的格式(由 format 参数给出)返回相应格式化了的时间字符串。在上面的例子中, Y-m-d 分别标了明年,月,日,都用数字来表示。有很多种格式的表示方法,具体的可参考 PHP3.0 文档。

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