用fwrite 写入字符串到文档里面怎么让指针停在最后一行的末尾而不是下一行啊?
每次在字符串后面加上PHP_EOL或者“\r\n”的话写完最后一行的时候,在文档里面看着是这样的
"String 1"
"String 2"
但是实际上我用fgets(代码如下)读取时
$fname1=("pending.txt");$fp1=fopen($fname1, "r+");while(!feof($fp1)){ $read=explode(";", fgets($fp1));//字符串中用;来打成数组 echo "read[0]= ".$read[0];// 用来测试 echo "<br/>";}fclose($fp1);
测试结果如下
read[0]= vvv@222.dpn
read[0]= vvv@333.dpn
read[0]=
为什么多出一个呢是因为写入最后一行字符串的时候。空格了一下,在TXT 文档里面按行读取就能读取到。
如何避免这个问题呢?因为需求我必须要用fgets(),如果功能允许我用file_get_contents()就好说了。。
求大神给解决方案
回复讨论(解决方案)
有什么不对吗?
你的 while(!feof($fp1)) 只在读到文件尾的时候才成立
而最后一行的 fgets($fp1) 只是读完了内容,并没有读到文件尾
要到下一轮擦会读到文件尾
所以可写作
while($buf = fgets($fp1)){ $read=explode(";", $buf);//字符串中用;来打成数组 echo "read[0]= ".$read[0];// 用来测试 echo "<br/>";}
有什么不对吗?
你的 while(!feof($fp1)) 只在读到文件尾的时候才成立
而最后一行的 fgets($fp1) 只是读完了内容,并没有读到文件尾
要到下一轮擦会读到文件尾
所以可写作
while($buf = fgets($fp1)){ $read=explode(";", $buf);//字符串中用;来打成数组 echo "read[0]= ".$read[0];// 用来测试 echo "<br/>";}
多谢了,这个问题是我引用删除里面的行数才引发的。我想删除某一行,原本的代码是这个
while(!feof($fp1)){ $read=explode(";", fgets($fp1));//获取txt中的行并且打成数组 if(read[0]==userinfo_en[0]&&read[2]==userinfo_en[2]) { file_put_contents($file,fgets($fp1)); }}fclose($fp1);//userinfor_en = username ;password; ccn ;exp; cvv; type ;// 0 1 2 3 4 5//这个是从别的地方用GET拿到的,意思就是执行的时候如果//读到接收到数据就把包含接收到的这一行全删了,可是我用了后直接除了该行,其余的行全删了。这才是核心问题,请问该如何//解决呢?我想了好久了

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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

Dreamweaver Mac version
Visual web development tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Chinese version
Chinese version, very easy to use

WebStorm Mac version
Useful JavaScript development tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.