search
HomeBackend DevelopmentPHP Tutorialfile_put_contents和fwrite读写文件的区别

第一种:

$james=fopen("index.htm","a");fwrite($james,$rose);fclose($james);

第二种:
file_put_contents('index.htm',$rose);

这两种方法读写文件有啥区别吗?第二种一行代码就够了,所以经常用第二种。什么情况下用第一种,什么情况下用第二种?有何利弊?


回复讨论(解决方案)

第二种也是要通过第一种来实现的。第一种功能更强大些。关键是fopen的第二个参数。

file_put_contents 是文件操作函数的一个包装
用于简化写文件的操作

应该注意的是:你的第一种方法与第二种并不是等价的
$james=fopen("index.htm"," a");
a 表示写入的内容附加在原来的内容的后面
与之等价的是
file_put_contents('index.htm',$rose,  FILE_APPEND);

与 file_put_contents('index.htm',$rose); 等价的基本文件操作的写法是
$james=fopen("index.htm"," w");
fwrite($james,$rose);
fclose($james);

包装与不包装的区别在于:
包装后简单、灵活性差
不包装灵活性强,但要复杂些

如楼上大虾所说,区别就是在打开写入文件有特殊要求的时候,如  在文件后面附加 字符串。。。等等,必须要用刀 fopen...   仅仅是打开写入的话,可以直接用file_put_contents,file_put_contents是多个操作简化的一个函数。

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Dependency Injection in PHP: Avoiding Common PitfallsDependency Injection in PHP: Avoiding Common PitfallsMay 16, 2025 am 12:17 AM

DependencyInjection(DI)inPHPenhancescodeflexibilityandtestabilitybydecouplingdependencycreationfromusage.ToimplementDIeffectively:1)UseDIcontainersjudiciouslytoavoidover-engineering.2)Avoidconstructoroverloadbylimitingdependenciestothreeorfour.3)Adhe

How to Speed Up Your PHP Website: Performance TuningHow to Speed Up Your PHP Website: Performance TuningMay 16, 2025 am 12:12 AM

ToimproveyourPHPwebsite'sperformance,usethesestrategies:1)ImplementopcodecachingwithOPcachetospeedupscriptinterpretation.2)Optimizedatabasequeriesbyselectingonlynecessaryfields.3)UsecachingsystemslikeRedisorMemcachedtoreducedatabaseload.4)Applyasynch

Sending Mass Emails with PHP: Is it Possible?Sending Mass Emails with PHP: Is it Possible?May 16, 2025 am 12:10 AM

Yes,itispossibletosendmassemailswithPHP.1)UselibrarieslikePHPMailerorSwiftMailerforefficientemailsending.2)Implementdelaysbetweenemailstoavoidspamflags.3)Personalizeemailsusingdynamiccontenttoimproveengagement.4)UsequeuesystemslikeRabbitMQorRedisforb

What is the purpose of Dependency Injection in PHP?What is the purpose of Dependency Injection in PHP?May 16, 2025 am 12:10 AM

DependencyInjection(DI)inPHPisadesignpatternthatachievesInversionofControl(IoC)byallowingdependenciestobeinjectedintoclasses,enhancingmodularity,testability,andflexibility.DIdecouplesclassesfromspecificimplementations,makingcodemoremanageableandadapt

How to send an email using PHP?How to send an email using PHP?May 16, 2025 am 12:03 AM

The best ways to send emails using PHP include: 1. Use PHP's mail() function to basic sending; 2. Use PHPMailer library to send more complex HTML mail; 3. Use transactional mail services such as SendGrid to improve reliability and analysis capabilities. With these methods, you can ensure that emails not only reach the inbox, but also attract recipients.

How to calculate the total number of elements in a PHP multidimensional array?How to calculate the total number of elements in a PHP multidimensional array?May 15, 2025 pm 09:00 PM

Calculating the total number of elements in a PHP multidimensional array can be done using recursive or iterative methods. 1. The recursive method counts by traversing the array and recursively processing nested arrays. 2. The iterative method uses the stack to simulate recursion to avoid depth problems. 3. The array_walk_recursive function can also be implemented, but it requires manual counting.

What are the characteristics of do-while loops in PHP?What are the characteristics of do-while loops in PHP?May 15, 2025 pm 08:57 PM

In PHP, the characteristic of a do-while loop is to ensure that the loop body is executed at least once, and then decide whether to continue the loop based on the conditions. 1) It executes the loop body before conditional checking, suitable for scenarios where operations need to be performed at least once, such as user input verification and menu systems. 2) However, the syntax of the do-while loop can cause confusion among newbies and may add unnecessary performance overhead.

How to hash strings in PHP?How to hash strings in PHP?May 15, 2025 pm 08:54 PM

Efficient hashing strings in PHP can use the following methods: 1. Use the md5 function for fast hashing, but is not suitable for password storage. 2. Use the sha256 function to improve security. 3. Use the password_hash function to process passwords to provide the highest security and convenience.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool