<?;
$dbuser;=;"root"
$dbhost;=;"localhost"
$dbpass;=;"password"
$dbname;=;"test2"
$dbtble;=;"books"
$mysql_link;=;mysql_connect($dbhost,$dbuser,$dbpass)
$column;=;mysql_list_fields($dbname,$dbtble,$mysql_link)
for($i=0;;$i<;mysql_num_fields($column);;$i++;);
{;
print;mysql_field_name($column,$i;)."<br>"
};
?>
一个更复杂的例子将向你演示PHP某些绝妙的功能。;
<html>
<head>
<title>Example;2;--;more;details</title>
</head>
<body;bgcolor="white">
<?;
$dbuser;=;"root"
$dbhost;=;"localhost"
$dbpass;=;"password"
$dbname;=;"test2"
$dbtable;=;"books"
//------;DATABASE;CONNECTION;-------//;
$mysql_link;=;mysql_connect($dbhost,$dbuser,$dbpass)
$column;=;mysql_list_fields($dbname,$dbtable,$mysql_link)
$sql;=;"SELECT;*;FROM;$dbtable"
$result;=;mysql_db_query($dbname,$sql)
?>
<table;bgcolor="black">
<tr><td>
<table>
</td></tr>
</table>
</body>
</html>
注意，我们竟能在同一文件中同时有HTML和PHP命令。这就是PHP脚本的奇妙之处。;
虚拟主机的设置;
现在是设置Apache处理一些虚拟主机的时间了。由于Apache提供的灵活性，虚拟主机可很简单地做到。首先你需要一个DNS服务器把虚拟主机的域名指向web服务器的IP地址。在DNS使用一个CNAME记录把;your_virtual_domain.com指向服务器的IP。其次你需要修改Apache的配置文件httpd.conf以增加新的虚拟域名。记住，这只是一个很基本的例子，你有勇气读一下Apache的指令。;
让我们看一个;httpd.conf;的例子。;
httpd.conf;片断;
#--------------------------------------------------------#;
#;VIRTUAL;HOST;SECTION;NON-SSL;
#--------------------------------------------------------#;
#;VirtualHost;directive;allows;you;to;specify;another;virtual;
#;domain;on;your;server.;Most;Apache;options;can;be;specified;
#;within;this;section.;
#;Mail;to;this;address;on;errors;
ServerAdmin;webmaster@domain1.com;
#;Where;documents;are;kept;in;the;virtual;domain;
#;this;is;an;absolute;path.;So;you;may;want;to;put;
#;in;a;location;where;the;owner;can;get;to;it.;
DocumentRoot;/home/vhosts/domain1.com/www/;
#;Since;we;will;use;PHP;to;create;basically;
#;all;our;file;we;put;a;directive;to;the;Index;file.;
DirectoryIndex;index.php;
#;Name;of;the;server;
ServerName;www.domain1.com;
#;Log;files;Relative;to;ServerRoot;option;
ErrorLog;logs/domain1.com-error_log;
TransferLog;logs/domain1.com-access_log;
RefererLog;logs/domain1.com-referer_log;
AgentLog;logs/domain1.com-agent_log;
#;Use;CGI;scripts;in;this;domain.;In;the;next;case;you;
#;can;see;that;it;does;not;have;CGI;scripts.;Please;
#;read;up;on;the;security;issues;relating;to;CGI-scripting.;
ScriptAlias;/cgi-bin/;/var/www/cgi-bin/domain1.com/;
AddHandler;cgi-script;.cgi;
AddHandler;cgi-script;.pl;
#;This;is;another;domain.;Note;that;you;could;host;
#;multiple;domains;this;way...;
#;Mail;to;this;address;on;errors;
ServerAdmin;webmaster@domain2.com;
#;Where;documents;are;kept;in;the;virtual;domain;
DocumentRoot;/virtual/domain2.com/www/html;
#;Name;of;the;server;
ServerName;www.domain2.com;
#;Log;files;Relative;to;ServerRoot;option;
ErrorLog;logs/domain2.com-error_log;
TransferLog;logs/domain2.com-access_log;
RefererLog;logs/domain2.com-referer_log;
AgentLog;logs/domain2.com-agent_log;
#;No;CGI’s;for;this;host;
#;End:;virtual;host;section;
使用上述例子在你的服务器上创建你自己的虚拟主机。如果你想从Apache网站上阅读每一条指令，它的网址是：http://www.apache.org。;
SSL虚拟主机;
创建SSL虚拟主机类似非SSL。除了你需要指定另外的指令，还有，你需要增加一个DNS记录并且修改;httpd.conf。这里有一个例子。;
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