


Templates can improve the structure of your website. This article explains how to use a new feature of PHP 4 and the template class to skillfully use templates to control page layout in a website composed of a large number of static HTML pages.
Outline:
=======================================
Separate functionality and layout
Avoid duplication of page elements
Template framework for static websites
================================ ===
Separate functionality and layout
First let’s look at the two main purposes of applying templates:
Separate functionality (PHP) and layout (HTML)
Avoid pages Element Repeating
The first purpose is the most talked about purpose, and it envisions a situation where a group of programmers write PHP scripts that generate the content of the page, while another group of designers designs the HTML and graphics to control the page's content. Final appearance. The basic idea of separating functionality and layout is to enable these two groups of people to write and use an independent set of files: programmers only need to care about files that only contain PHP code and do not need to care about the appearance of the page; while page designers can use their own Design your page layout with the most familiar visual editor, without worrying about breaking any PHP code embedded into the page.
If you have watched a few tutorials about PHP templates, then you should already understand how templates work. Consider a simple page part: the top of the page is the header, the left is the navigation bar, and the rest is the content area. This kind of website can have the following template files:
{HEADER}
{LEFTNAV}{CONTENT}

Foo
Bar
You can see how the page is constructed from these templates: the main template controls the layout of the entire page; the header template and leftnav template control the common elements of the page. Identifiers inside curly braces "{}" are content placeholders. The main benefit of using templates is that interface designers can edit these files according to their own wishes, such as setting fonts, modifying colors and graphics, or completely changing the layout of the page. Interface designers can edit these pages with any ordinary HTML editor or visualization tool, because these files only contain HTML code, without any PHP code.

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。


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