I believe that everyone who has been to OSO will be deeply impressed by OSO’s forum. This forum is excellent in every aspect. Do you want to have such a beautiful forum on your homepage? In fact, it is not too complicated. Below we will only imitate the OSO forum from some basic parts.
Since I only use this forum as my message board, my forum can be regarded as a simple match of the OSO forum. 1. In my forum, users can only speak after logging in. The user's ID is stored in a cookie variable called "cookie_user". 2. My forum does not have sub-forums. 3. I do not count the number of clicks on a topic. , 4. I have not designed the icon in front of each topic in the OSO forum to indicate whether there are new posts. 5. I have not considered the optional topic arrangement and display time period provided by the OSO forum. 6. There is no statistics on members’ posting points. 7. There is no function for moderators to manage the forum. 8. There is no function for editing posts. We will touch on how to extend these eight functions based on my program at the end.
First is the design of a database. In fact, a forum involves two data tables. Let’s temporarily name them user and guestbook. The user table stores the information of registered users. The creation statement is as follows:
create table my_user(
user_id char(12) not null,/*username*/
user_password varchar(8) not null,/*user password*/
PRIMARY KEY (user_id)
)
The guestbook stores the post content.The creation content is as follows:
CREATE TABLE guestbook (
id bigint DEFAULT '0' NOT NULL auto_increment,/*speak id, auto-increment field*/
name varchar(12) NOT NULL,/*topic creation Person*/
type tinyint NOT NULL,/*type 0-reply; 1-main post*/
theme varchar(50) NULL,/*theme*/
content blob NOT NULL,/*content */
icon tinyint NOT NULL,/*emoticon*/
time_open datetime not NULL,/*topic creation time*/
time_close datetime not NULL,/*last reply time*/
answer_count int not null,/*number of replies*/
answer_name varchar(12) not null,/*last replyer*/
main_id bigint null,/*main post id*/
PRIMARY KEY (id) /**/
);
The program contains five php source codes: connect.inc.php, faq.php, read.php, post.php, reply.php, post_end.php
connect.inc.php: (used to connect to the database)
$dbhostname = "localhost";
$dbusername = "";
$dbpassword = "";
$ dbName = "";
MYSQL_CONNECT($dbhostname, $dbusername, $dbpassword) OR DIE("Unable to connect to database");
@mysql_select_db( "$dbName") or die( "Unable to select database "); " ;
src="mypic/x.js">
;TABLE align=center border=0 cellPadding=4 cellSpacing=1 width=100% class=body_br >
$res = mysql_query($query);
$row = mysql_fetch_row($res);
$total =$row[0];
1;
echo $total; /TD>
td width=1%>
$res = mysql_query($query);
$row = mysql_fetch_row($res);
echo $row[0];
?>

>
题
function TdBackColor() {
static $ColorStr;
if ($ColorStr=="#ededed") {
$ColorStr="#dedede";
} else {
$ColorStr="#ededed";
}
return($ColorStr);
}
if (!$page) $page=1;
$ysylimit=($page-1)*20;
$query = "select theme,answer_count,id,name,answer_name,DATE_FORMAT(time_close,'%Y-%m-%d') as mydate from guestbook where type=1 order by time_close DESC limit ".$ysylimit.",20 ";
$res = mysql_query($query);
for ($i=0; $i $row = @mysql_fetch_array($res);
if(!$row) break;
$ColorStr=TdBackColor();
echo "
echo "";
if ($row['answer_count']>5)
{echo " echo "class=small color=#666666> 分页:";
for ($j=1;$j";
}
echo "
echo "
echo $row['name']."
$ii=$row['answer_count']-1;
echo "
echo "
echo $row['answer_name']."
echo "
?>
分页:
$page1=$page-1;
$page2=$page+1;
if ($page==1) echo "首页 前页 ";
else echo "首页 前页 ";
if ($page==$totalpage) echo "后页 尾页 ";
else echo "后页 尾页 ";
?>

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

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 each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

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

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.


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