Home  >  Article  >  Backend Development  >  10 recommended articles about the php file_exists() function

10 recommended articles about the php file_exists() function

怪我咯
怪我咯Original
2017-06-11 10:36:581905browse

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

10 recommended articles about the php file_exists() function

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...

2. PHP上传图片、删除图片简单实例

10 recommended articles about the php file_exists() function

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

3. Java 实例 - 检测文件是否存在

10 recommended articles about the php file_exists() function

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

10 recommended articles about the php file_exists() function

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

10 recommended articles about the php file_exists() function

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"); ...

6. 为什么使用mkdir后总是提示错误??

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.

9. The solution to the problem that the file_exists function in PHP cannot detect file names containing Chinese characters

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!

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