PHP作为一款后端语言，为了输出给浏览器让浏览器呈现出来，无可避免的要输出HTML代码，下文介绍下我用过的三种PHP/HTML混编方法
1.单/双引号包围法
这是最初级的方法了，用法就像下面这样
1 <?php 2 echo ' 3 <!DOCTYPE html> 4 <html> 5 <head> 6 <title> </title> 7 </head> 8 <body> 9 <span>测试页面</span>10 </body>11 </html>12 ';13 ?>
这样是最简单的一种方法了，直接用单引号包装上就行了
至于双引号和单引号的区别，就在于前者解析引号内的变量，而后者不解析引号内的变量，参看下面的例子
1 <?php2 $Content='Hello!';3 echo "$Content";4 echo '<br>';5 echo '$Content';6 ?>
输出
1 Hello!2 $Content
由此可见，用双引号包围的字符串中的变量名自动解析为了变量值，而用单引号包围则依然显示变量名
这样书写的缺点有两点
1.如果输出内容中包含单/双引号将极难处理，因为PHP无法判断这个引号是属于程序的还是输出内容的，所以会报错
2.这样书写一些现代文本编辑器（如SublimeText）将无法对引号包围的输出的内容进行语法着色，如果出现一些格式问题将极难发现。图中为SublimeText3的一张截图，上面的是正常的着色，下面则是用引号包围的着色
2.使用HEREDOC/NOWDOC
HEREDOC和NOWDOC是PHP5.3开始支持的一种新特性，它允许在程序中使用一种自定义的标志符来包围文本，而HEREDOC和NOWDOC的关系就类似于双引号包围和单引号包围一样，前者解析区块内的变量，而后者不解析区块内的变量
下面介绍HEREDOC和NOWDOC的用法
1 <?php 2 $Content='Hello!'; 3 4 //下面写出了一个HEREDOC，其中标识LABEL可以自定义为任何字符串，但要保证开头的标识和结尾的标识一样 5 echo <<<LABEL 6 $Content 7 LABEL; 8 //结尾的方法：另起一行，打上LABEL。注意结尾的标识前面和后面不要插入任何字符，空格也不行 9 10 echo '<br>';//为了演示方便换行11 12 //NOWDOC和HEREDOC的书写方式差别在于NOWDOC的标识符需要用单引号包围13 echo <<<'LABEL'14 $Content15 LABEL;16 //其他无异17 18 19 ?>
也可以参考PHP.net上的关于这两个的wiki：https://wiki.php.net/rfc/heredoc-with-double-quotes
用HEREDOC/NOWDOC书写极好的解决了包围引号的问题，但依然没有解决语法着色失效的问题
3.HTML中嵌入PHP程序块（推荐）
这是一种非常合适的办法，并且这种方法广泛用在了诸如WordPress模板等场合中。书写起来也较为方便，直接在需要输出的地方写上相关的代码就行了，就像下面这样
1 <?php 2 3 //首先在这里写好相关的调用代码 4 function OutputTitle(){ 5 echo 'TestPage'; 6 } 7 function OutputContent(){ 8 echo 'Hello!'; 9 }10 11 //然后再下面调用相关函数就可以了12 ?>13 14 <!DOCTYPE html>15 <html>16 <head>17 <title><?php OutputTitle(); ?></title>18 </head>19 <body>20 <span><?php OutputContent(); ?></span>21 </body>22 </html> 我认为这种方法是在这三种方法中最好的，但是这样做的缺点是如果这样的代码块一多了就会严重影响程序阅读。
4.使用前端模板引擎
由于前端的重要性在整个Web开发中日益上升，现在前/后端工程师逐渐在分离成两个职业，所以说为了确保前/后端工程师能够相互配合，使前端开发和后端开发出来的东西对接更完美，逐渐催生出了一系列前端模板引擎，比如Smarty。使用Smarty书写的实现代码可读性非常的高，这使前/后端的分离也更加的高效和便捷。有兴趣的同学可以去搜索了解
Working with Flash Session Data in LaravelMar 12, 2025 pm 05:08 PMLaravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-
Build a React App With a Laravel Back End: Part 2, ReactMar 04, 2025 am 09:33 AMThis is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev
Simplified HTTP Response Mocking in Laravel TestsMar 12, 2025 pm 05:09 PMLaravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>
cURL in PHP: How to Use the PHP cURL Extension in REST APIsMar 14, 2025 am 11:42 AMThe PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.
12 Best PHP Chat Scripts on CodeCanyonMar 13, 2025 pm 12:08 PMDo you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom
Notifications in LaravelMar 04, 2025 am 09:22 AMIn this article, we're going to explore the notification system in the Laravel web framework. The notification system in Laravel allows you to send notifications to users over different channels. Today, we'll discuss how you can send notifications ov
Explain the concept of late static binding in PHP.Mar 21, 2025 pm 01:33 PMArticle discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo
PHP Logging: Best Practices for PHP Log AnalysisMar 10, 2025 pm 02:32 PMPHP logging is essential for monitoring and debugging web applications, as well as capturing critical events, errors, and runtime behavior. It provides valuable insights into system performance, helps identify issues, and supports faster troubleshoot
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Zend Studio 13.0.1
Powerful PHP integrated development environment
Notepad++7.3.1
Easy-to-use and free code editor
Atom editor mac version download
The most popular open source editor
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
