固然基数据库的留言簿可以作得很漂亮,而且也更好管理。 但是对于那些没有数据库空间的朋友们来说,基于文本的留言簿也完成可以适用于个人站来使用。而且只要我们努力去做同样可以做得很好,甚至可以说丝毫不比基于数据库的留言簿差。在这里我向介绍一个基于文本的留言簿。在下面这个地址你可以看到它的演示:http://bamboo.oso.com.cn/note.htm,它具有以下两个特点:
1. 用不同的颜我显示不同人发表的留言;
2. 每个留言者具有选择小图标的功能。
本留言簿要由以下四个文件组成:记录留言内容的note.txt文件;记录留言文字显示颜色的color.txt文件;这两个文件都可以有notepad来创建。反应留言表单的note.htm文件;最终处理留言信息的note.php文件。以下是它们的源代码:
note.htm:
其中:nx.gif是小图标图片,你自己可以更换。
Note.php:
if($primsg==1){
$f = fopen("note.txt","r");
$msg = fread($f,filesize("note.txt"));
fclose($f);
print "$msg"; }
else{
if ($name=="") {
print "你总得给我留下的你的大名吧!否则我如何称呼你?
";}
else if ($note=="") {
print "你总得说点什么吧?否则点发送干什么?不会是点错了吧?想查看留言??
";
}
else{
if ($email=="") {
print "连电子邮件地址也不给留?我如何跟你联系?
";
}
else if ($webname==""||$webadd="") {
print "你没有个人主页?如果有还是希望你给我留下的地址,当作是宣传也可以嘛!
";
}
$t = date(Y年m月d日);
$note = str_replace ( " $note = str_replace ( ">", ">", $note);
$note = str_replace ( "\n", "
", $note);
$f = fopen("color.txt","r+");
$color1=fread($f,filesize("color.txt"));
if($color1==0){
$color=ff0000;}
else if($color1==1){
$color="0000ff";}
else if($color1==2){
$color="00ff00";
}
else if($color1==3){
$color="000000";
}
if($color1>=3){
$color1=0;}
else{
$color1+=1;
}
fseek($f,0);
fputs($f,$color1);
fclose($f);
for($I=1;$I if($I==$icon){
$pic=$I;
}
}
$str=strval($pic);
$strhtml="

$add="";
$main = "$strhtml
$name    个人主页: $add$webname      ($t)
说:$note
";
$f = fopen("note.txt","a");
fwrite($f,$main);
fclose($f);
$f = fopen("note.txt","r");
$msg = fread($f,filesize("note.txt"));
fclose($f);
echo"$msg";
}
}
?>

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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