用文本文件制作留言板提示下
管理你的留言在文本文件中实现不如数据库中那么方便,下面我们想办法来实现这个效果!
在输出的时候我们是用数组来保存数据,那么我们会很方便地为每组数据按顺序分配一个序号,通过对这个序号来操作,我们就可以方便地修改数据!
$date[0]为文本文件中第一行,我们输出时分配序号为0.
输出时有这样的效果:
修改留言
我们再定制modify.php
if($id!=””){
$date=file(“txt/mytxt.txt”);
$str=explode(“&”,$date[0])
?>
}else{
$str=$tech1.”&”. $tech2. ”&”.$tech3….
If($str!=””){
//将修改后的数据写回文本文件!
}
}?>
在这个过程中要注意保持$id的值不丢失,在写回数据时先将文本中的值读入$date,再$date[$id]=$str;
$fp=fopen("txt/mytxt.txt","w");
fwrite($fp,$date);
fclose($fp);

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.

Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps

HTML cannot read the database directly, but it can be achieved through JavaScript and AJAX. The steps include establishing a database connection, sending a query, processing the response, and updating the page. This article provides a practical example of using JavaScript, AJAX and PHP to read data from a MySQL database, showing how to dynamically display query results in an HTML page. This example uses XMLHttpRequest to establish a database connection, send a query and process the response, thereby filling data into page elements and realizing the function of HTML reading the database.

Baidu Tieba app prompts that the operation is too frequent. This prompt is usually to maintain the normal operation and user experience of the platform to prevent malicious screen spam, advertising spam and other inappropriate behaviors. For specific handling methods, you can read the tutorial shared by the editor. Baidu Tieba app prompts that the operation is too frequent. Sharing how to deal with it 1. When the system prompts [Operation is too frequent], we need to wait for a while. If you are anxious, you can do something else first. Generally, after waiting for a while, this prompt message will It will disappear automatically and we can use it normally. 2. If after waiting for a long time, it still displays [Operation Too Frequent], we can try to go to Tieba Emergency Bar, Tieba Feedback Bar and other official Tieba, post to report this phenomenon and ask official personnel to solve it. 3.

How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())

To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.

The os.Rename function is used in Go language to rename files. The syntax is: funcRename(oldpath,newpathstring)error. This function renames the file specified by oldpath to the file specified by newpath. Examples include simple renaming, moving files to different directories, and ignoring error handling. The Rename function performs an atomic operation and may only update directory entries when the two files are in the same directory. Renames may fail across volumes or while a file is in use.

Using the database callback function in Golang can achieve: executing custom code after the specified database operation is completed. Add custom behavior through separate functions without writing additional code. Callback functions are available for insert, update, delete, and query operations. You must use the sql.Exec, sql.QueryRow, or sql.Query function to use the callback function.
