10 recommended articles about the php file_exists() function
定义和用法clearstatcache()函数的作用是：清除文件状态缓存。 PHP的缓存数据对更快更好的运行函数是非常有利的。如果一个文件在脚本中测试了多次，你也许会禁止对正确的结果进行缓存。为了实现这点，你可以使用clearstatcache()函数。 语法 clearstatcache()提示和注意 提示：执行缓存的函数： stat() lstat() file_exists() is_writable() is_readable() is_executable() is_file() is_dir() is_link() filectime() fileatime() filemtime() fileinode() filegroup() fileowner() filesize() filetype() fileperms() 案例 复制代码 代码如下: 上述代码将输出下面的结果：
1. 有关php clearstatcache()函数的文章推荐
简介：定义和用法clearstatcache()函数的作用是：清除文件状态缓存。 PHP的缓存数据对更快更好的运行函数是非常有利的。如果一个文件在脚本中测试了多次，你也许会禁止对正确的结果进行缓存。为了实现这点，你可以使用clearstatcache()函数。 语法 clearstatcache()提示和注意 提示：执行缓存的函数： stat() lstat() file_exists() is_wri...
简介：简单PHP上传图片、删除图片实现代码上传图片：if (!empty($_FILES["img"]["name"])) { //提取文件域内容名称，并判断 $path=”uppic/”; //上传路径 if(!file_exists($path)) { //检查是否有该文件夹，如果没有就创建，并给予最高权限 mkdir(“$path”, 0700); }//END IF //允许上
简介：以下实例演示了使用 File 类的 file.exists() 方法来检测文件是否存在：
4. PHP访客计数器
简介：<?php // PHP访客计数器 function num() { if(!file_exists("n.txt")) { $fp=fopen("n.txt","w"); fwrite($fp,"1"); fclose($fp); $n=1; ...
5. php 图片上传
简介：if (!empty($_FILES["img"]["name"])) { //提取文件域内容名称，并判断 $path="uppic/"; //上传路径 if(!file_exists($path)) { //检查是否有该文件夹，如果没有就创建，并给予最高权限 mkdir("$path, 0700"); ...
简介：执行后文件能成功创建出来 但是总是给出错误提示 Warning: mkdir(): File exists in D:wamp64wwwaaa.php on line 26 明明应该不存在$name2的时候才回去执行这句话啊 {代码...}
7. 解决cannot mount volume over existing file, file exists /var/lib/docker/aufs/mnt/
简介：:本篇文章主要介绍了解决cannot mount volume over existing file, file exists /var/lib/docker/aufs/mnt/，对于PHP教程有兴趣的同学可以参考一下。
8. Solution to open_basedir restriction in effect in PHPExcel
Introduction:: This article mainly introduces open_basedir restriction in effect in PHPExcel For solutions, students who are interested in PHP tutorials can refer to it.
Introduction: PHP The solution to the problem that the file_exists function cannot detect file names containing Chinese characters: File_exists() is generally used in PHP to determine whether a file or folder exists. If the file or folder exists, it returns true, and if it does not, it returns false. Today, when implementing the file download function, I found that when the web page uses UTF8 encoding, the function cannot detect whether the file containing Chinese exists and always returns false. After a long time of modification, I discovered that it was because the full path was not encoded. Simply transcoding the file name was not enough. The following code cannot detect files containing Chinese
10. get_headers function determines whether the remote file exists
Introduction: :get_headers function determines whether the remote file exists: / determines whether the remote file exists function remote_file_exists($url) { $executeTime = ini_get('max_execution_time'); ini_set('max_execution_time', 0); $headers = @get_headers($url) ; ##linux - varnish3.x.x The error varnishd dead but pid file exists
php - Determine whether there is a problem with the file on the server
java - When using springmvc to upload images, the error message already exists and could not deleted
javascript - The audio upload name is empty
The above is the detailed content of 10 recommended articles about the php file_exists() function. For more information, please follow other related articles on the PHP Chinese website!
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
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
1666
14
1425
52
1325
25
1272
29
1252
24
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
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
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
PHP and Python: Code Examples and Comparison
Apr 15, 2025 am 12:07 AM
PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.
PHP vs. Other Languages: A Comparison
Apr 13, 2025 am 12:19 AM
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: Different Paradigms Explained
Apr 18, 2025 am 12:26 AM
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.
