Summarize what are the PHP file functions

一个新手
Release: 2023-03-16 13:00:02
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Simply organize some common functions for operating files in PHP:

  • filetype()  获取文件类型函数
    is_dir()  判断给定的文件名是否是一个目录  
    is_executable()  判断给定文件是否是可执行
    is_file()  判断给定文件是否存在
    is_link()  判断给定文件是一个符号链接(软链接)
    is_readable()  判断给定文件是否可读
    is_writeable()  判断给定文件是否可写
    file_exists()  判断文件或目录是否存在
    filesize()  获取文件大小(不能获取目录大小)
    filectime()  文件创建时间
    filemtime()   文件修改时间
    fileatime()  文件访问时间
    stat()  获取文件大部分参数
    basename($path,[$suffix]) 获取文件名
    $path URL地址
    $suffix  可选,规定扩展名,如果有此扩展名则不显示扩展名
    1 <?php2 3     $url = &#39;http://www.this.com/test/abc.php&#39;;4     echo basename($url);  // abc.php5     echo basename($url,&#39;.php&#39;); // abc      
    dirname($path)    获取路径地址
      $path  URL地址
    1 <?php2     echo dirname("http://www.cs.com/a/b/ab.php"); // http://www.cs.com/a/b
     
    pathinfo($path,[options])  获取路径信息
    $path      传入路径
    $option    规定返回数组元素,默认返回所有元素
     1 <?php 2       $path = &#39;http://localhost/a/b/ab.php&#39;; 3     print_r(pathinfo($path)); 4     // Array ( 
     5     //     &#39;dirname&#39; => &#39;http://localhost/a/b&#39;, 
     6     //     &#39;basename&#39; => &#39;ab.php&#39;, 
     7     //     &#39;extension&#39; => &#39;php&#39;, 
     8     //     &#39;filename&#39; => &#39;ab&#39; 
     9     //     ) 10     print_r(pathinfo($path,PATHINFO_DIRNAME)); //  http://localhost/a/b11     print_r(pathinfo($path,PATHINFO_BASENAME)); // ab.php12     print_r(pathinfo($path,PATHINFO_EXTENSION)); // php13     print_r(pathinfo($path,PATHINFO_FILENAME)); // ab 
     
    opendir()    打开一个目录,返回目录资源句柄
    readdir(&#39;资源句柄&#39;)   从目录中获取一个文件或目录,并指针向下移动一位
    closedir(&#39;资源句柄&#39;)  关闭打开的目录
    rewinddir(&#39;资源句柄&#39;)  将指针移动到首位
    disk_free_space(‘c:’)  返回指定目录可用空间
    disk_total_space(&#39;c:&#39;)  返回指定目录共计大小
    mkdir()   创建一个目录
    rmdir()   删除一个目录
    unlink()  删除一个文件  返回bool值
    copy()   复制文件  不支持复制目录
    Copy after login

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