Home php教程 php手册 引用文件

引用文件

Jun 21, 2016 am 09:02 AM
center gt html lt php

 



1
PHP HTML 中的几种标识、注释

如何在HTML中区分出那些是我们需要的PHP程序呢?,PHP为此提供了四种方法:

1.1、用 .....?> ,如: echo "I made it!"; ?>

1.2、用 php......?>, 如:php phpinfo(); ?>

1.3、例:

echo "Good Luck!";

 

1.4、用 ,如:这是类似ASP语法嵌入的PHP程序";%>

通常我们用前两种方法,至于第四种,我们需要在php.ini配置中打开asp_tags选项

注意:写程序时最好先处理好纯HTML格式文件再加入PHP代码,这样又容易又快。

PHP中加入注释的方法是很灵活的,如:

1.5// C语言的注释方法

1.6# Unix Shell 注释方法

1.7/*.....................

.........

...........*/ 多行注释法,使用这种方法要注意不要出错

2 最简单的PHP程序

您还记得我们在安装PHP进行测试时写的程序吗?

first.php    //我们的第一个程序

php

echo "I Made It!\n";

echo "Good Luck!\n";

phpinfo();

?>

这就是一个较为简单的PHP程序,有没有更简单的呢? 有,请看:

1test.php

?echo

("这是个简单的PHP程序\n");

2test2.php

php phpinfo(); ?>

这两个都是简单的PHP程序。注意到了吗?本程序最后要以"文件名.PHP"的形式存储.

3、把当前日期加到HTML

second.php



Our Second PHP script


这是我们的第二个php程序


//PHP
脚本开始了
$today=date("Y-m-d G:i:s");
echo "

今天是:$today.";
?>
//PHP
脚本结束了


date()函数中的参数解释:

Y - 年,四位数字; : "1999"
m -
月份,二位数字,若不足二位则在前面补零; : "01" "12"
d -
几日,二位数字,若不足二位则前面补零; : "01" "31"
G - 24
小时制的小时,不足二位补零; : "0" "23"
i -
分钟; : "00" "59"
s -
; : "00" "59"

4 引用文件

PHP引用文件的方法有两种:

require("MyRequireFile.php");用这种方法时,通常是放在PHP程序的最前面,PHP程序执行前就会先读入require指定的文件。

include("MyIncludeFile.php");用这种方法时,通常放在要使用的地方,当程序读到include时,才将指定的文件度进来。

通过这两个方法,可以将常用的功能写成一函数,供引用。简化工作。

5、小结

5.1、所有PHP语句都必须用“"”符号,而不是“”“””

5.2、脚本中可以加注释,可以用/*...*/来注释一段话,或者在整行的前面加#注释一行。

5.3、每条PHP语句都以分号结束。

5.4、任何输出语句中的HTML语句都会被客户浏览器来解释输出。

 



Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1666
14
PHP Tutorial
1273
29
C# Tutorial
1252
24
PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP in Action: Real-World Examples and Applications PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

The Enduring Relevance of PHP: Is It Still Alive? The Enduring Relevance of PHP: Is It Still Alive? Apr 14, 2025 am 12:12 AM

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP and Python: Code Examples and Comparison PHP and Python: Code Examples and Comparison Apr 15, 2025 am 12:07 AM

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP vs. Other Languages: A Comparison PHP vs. Other Languages: A Comparison Apr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python: Different Paradigms Explained PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP: Handling Databases and Server-Side Logic PHP: Handling Databases and Server-Side Logic Apr 15, 2025 am 12:15 AM

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

See all articles