How to quickly know the size, type and permissions of the file in php file operations

In the previous article "php file operation: how to obtain the time attribute (information) of the file", we learned that we can use the built-in functions filectime(), filemtime, fileatime() to obtain separate files Three time attributes: creation time, modification time and last access time. Interested friends can learn about it~

The main content of this article is to understand the file size, file type and file/directory permissions method of obtaining. Let’s give you a detailed introduction to how to obtain it.

1. Get the size of the file

You can use thefilesize($filename)function to return the specified file$filenamethe size of. Returns the file size in bytes on success or FALSE on failure.

The output result is:

2. Get the file type

You can usefiletype ($filename)The function returns the type of the specified file or directory$filename. If successful, one of the following 7 possible values will be returned:

• fifo

• ##char

##dir
block
link
file
unknown
If failed, return FALSE.

{$filename} 文件的类型为：".filetype($filename); $filename = "D:/demo/img"; echo "
{$filename} 文件的类型为：".filetype($filename); ?>

The output result is:

You can use

The function returns the permissions of the file or directory$filename. If successful, the permissions are returned as a number. On failure, returns FALSE.

<?php header("content-type:text/html;charset=utf-8"); $filename = "test.txt"; echo "{$filename} 文件的权限为：".fileperms($filename); ?>

# Description: The number representing permissions has three possible values. To set multiple permissions, you can use the following numbers. Total:

1 = Execute permission
#2 = Write permission
4 = Read permission
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