Backend DevelopmentPHP TutorialPHP study notes (2) Understand the basic syntax and directory structure of PHP, study the basic syntax of notes_PHP tutorial
PHP study notes (2) Understand the basic syntax and directory structure of PHP, and learn the basic syntax of notes
Pass this lesson,
1. Understand the directory structure of AppServ
2. We can understand the basic syntax structure of PHP
1 My AppServ installation directory is drive E:
①Use the command line to operate the apache server
Opening and closing the apache server:
httpd -k restart //重启 httpd -k stop //关闭 httpd -k start //开启
If you modify the port, you can modify it in the following directory:
httpd.conf (main configuration file) in AppServApache2.2conf
②Use the command line to operate the mysql database
Opening and closing the Mysql database:
net stop mysql //关闭数据库 net start mysql //开启数据库
③Mysql database server description:
1. Installation path: E:AppServMySQL
2. Command path: E:AppServMySQLbin
3. Configuration file: E:AppServMySQLmy.ini
4. Database storage directory: E:AppServMySQLdata
E:AppServMySQLdatamysql
.frm table structure
columns_priv.MYD table data
columns_priv.MYI index
④php coordination file
C:Windowsphp.ini
① php tag
Write a php program index.php
<?php phpinfo(); ?> <?php echo "Hello World"; ?>
②Note: Only files with the .php suffix can write php code, and the php code must be uninstalled
between③Write html code in php and embed php tags in html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>Untitled</title>
</head>
<?php
$y=date('y');
echo "{$y}";
if($y>10){
echo "目前大于10年,目前是{$y}";
}else{
}
?>
</body>
</html>
④php comment:
/* */Multi-line comments
//Single line comment
⑤. Command separator
must end with;
⑥.php code writing format, pay attention to indentation, {code segment}
⑦.php statements and functions, blank lines between functions
With curly brackets above and below, separated by blank lines, easy to read
⑧.Variable
The name should be meaningful, do not use letters, single numbers, or Chinese characters
Do not use Chinese characters for file names and directory names
"PHP and MySQL Web Development" is the "php bible". In comparison, "Learning PHP from Zero Basics" is more suitable for beginners. Reading this book, it is easy to feel that the author wrote it carefully.
This book is actually one of the series "Learning Programming from Zero Basics", the others are very good.
The content is well designed. There is a preface that is very pertinent. It is advice given by experienced programmers to newbies. Here is the excerpt:
++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++
Things to note when learning programming A few points:
1. Don’t memorize grammar: Many beginners try to memorize various grammars. In fact, this is extremely wrong. There are so many grammars and specifications in program development that it is impossible to remember them all. You only need to know that there are Such a function is enough. You can browse books or find help files when needed, which saves time and effort.
2. Use multiple hands and practice more: People who only know how to chew books will not become masters of development. Only by writing programs on the computer more can you improve your understanding of programming in practice.
3. When you encounter a problem, try to solve it yourself first: use your own time to try your best to solve it. If it doesn’t work, go to someone for help. Never ask someone for help immediately when you encounter a problem. This will never improve much. .
4. Use Google and Baidu more: The Internet is a large knowledge base and the best teacher. The problems you encounter have been encountered by others, so search more.
4. Read more other people’s source codes: Understand other people’s design ideas and constantly integrate them into your own use.
++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++
The shortcoming of this book is that there are no line markings in front of the code, and "at line xxx," is used extensively in the explanation of the code, A big mistake.
Summary: In terms of knowledge points, "Learning PHP from Zero Basics" may not be complete, but what we need is not a dictionary, what we need is a step-by-step book that will make you interested in learning, right? ?
Okay
First find an introductory book on PHP and do some programming on querying databases
After that, when you are proficient, go find an open source project for secondary development
For example ecmall , ecshop, phpcms, etc., you can search a lot of them online
Familiar with MVC and the framework. . .
Then there will be no more
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