Template engines for PHP and CGI: How to achieve website reusability-PHP Tutorial-php.cn

Template engines for PHP and CGI: How to achieve website reusability

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Release： 2023-07-20 22:14:01

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PHP and CGI template engines: How to achieve website reusability

Introduction:
When developing websites, we often need to deal with the display of dynamic content. In order to achieve code maintainability and reusability, using a template engine is a wise choice. This article will introduce PHP and CGI, two commonly used template engines, and show how to use them to achieve website reusability through code examples.

1. PHP template engine
PHP is a widely used server scripting language with flexibility and powerful functions. The PHP template engine is a tool for embedding dynamic content in PHP code. The following are the steps to use the PHP template engine to achieve website reusability:

Define template files:
First, we need to create one or more template files to define the layout and style of the website . Template files usually contain HTML and PHP code. In template files, we can embed dynamic content using specific tags such as <?php and ?>.

Example (header.php):

<!DOCTYPE html>
<html>
<head>
    <title>网站标题</title>
    <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
    <header>
        <h1>网站名称</h1>
    </header>

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Using template files:
When we need to generate a web page through a template engine, we Template files can be loaded and used in PHP code. PHP provides include and require functions to achieve this purpose.

Example (index.php):

<?php
include 'header.php';
?>

<main>
    <h2>欢迎访问我们的网站！</h2>
    <p>这是一个示例网页。</p>
</main>

<?php
include 'footer.php';
?>

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Separate dynamic content:
In order to separate template files and dynamic content, we can Define variables in PHP code and then use these variables in template files to display dynamic content.

Example (index.php):

<?php
$pageTitle = '首页';
$welcomeMessage = '欢迎访问我们的网站！';
include 'header.php';
?>

<main>
    <h2><?php echo $pageTitle; ?></h2>
    <p><?php echo $welcomeMessage; ?></p>
</main>

<?php
include 'footer.php';
?>

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2. CGI Template Engine
CGI (Common Gateway Interface) is a A protocol for transferring data between servers and applications. Using the CGI template engine, we can achieve code maintainability and reusability in website development. The following are the steps to use the CGI template engine to achieve website reusability:

Define template files:
Similar to the PHP template engine, we first need to create one or more template files for defining The layout and style of the website. Template files can contain HTML and CGI script code. In template files, we can use specific tags such as [% and %] to embed dynamic content.

Example (header.tmpl):

<!DOCTYPE html>
<html>
<head>
    <title>网站标题</title>
    <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
    <header>
        <h1>网站名称</h1>
    </header>

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Using template files:
When we need to generate a web page through a template engine, we Template files can be loaded and used in CGI scripts. The CGI template engine provides corresponding functions and syntax to achieve this purpose.

Example (index.cgi):

#!/usr/bin/perl
use strict;
use warnings;
use Template;

my $tt = Template->new();
my $vars = {
    pageTitle => '首页',
    welcomeMessage => '欢迎访问我们的网站！'
};

$tt->process('header.tmpl', $vars) || die $tt->error();
print '<main>';
print '<h2>[% pageTitle %]</h2>';
print '<p>[% welcomeMessage %]</p>';
print '</main>';

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Conclusion:
By using PHP or CGI template engines, we can combine dynamic content with the website's Separation of layout and style. Doing so improves the maintainability and reusability of your code. Whether you choose PHP or CGI template engines, we can achieve website reusability through simple operations and code examples.

This article is only a brief introduction and illustration, and does not cover all the usage and features of PHP and CGI template engines. Readers can further study and explore more functions and applications of these template engines. Hope this article is helpful to readers!

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