深入理解PHP中的基本语法和目录结构
这篇文章主要介绍了解PHP的基本语法以及目录结构,需要的朋友可以参考下
通过这节课
1.了解AppServ的目录结构
2.我们可以了解PHP的基本语法结构
1 我的AppServ安装目录是E盘:
①运用命令行的方式去操作apache服务器
apache服务器的开启和关闭:
httpd -k restart //重启 httpd -k stop //关闭 httpd -k start //开启
如果修改端口的话,可以在下面的目录进行修改:
AppServ\Apache2.2\conf 中的 httpd.conf(主配置文件)
②运用命令行的方式操作mysql数据库
Mysql数据库的开启和关闭:
net stop mysql //关闭数据库 net start mysql //开启数据库
③Mysql数据库服务器说明:
1.安装路径:E:\AppServ\MySQL
2.命令路径:E:\AppServ\MySQL\bin
3.配置文件:E:\AppServ\MySQL\my.ini
4.数据库的存放目录:E:\AppServ\MySQL\data
E:\AppServ\MySQL\data\mysql
.frm 表结构
columns_priv.MYD 表数据
columns_priv.MYI 索引
④php的配位文件
C:\Windows\php.ini
① php标记
写一个php程序 index.php
<?php phpinfo(); ?> <?php echo "Hello World"; ?>
②注意:只有.php后缀的文件中可以书写php代码,而且php代码必须卸载之间
③在php中写html代码,在html中嵌套php标签
<!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注释:
/* */多行注释
//单行注释
⑤.指令分割符
必须以;结尾
⑥.php代码书写格式,注意缩进,{代码段}
⑦.php语句与函数,函数与函数之间的空行
带有大括号的上下,用空行隔开,容易阅读
⑧.变量
名字要有意义,不要用字母,单个数字,或者中文
文件名和目录名不要使用中文
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