How to get the time attribute (information) of the file in php file operation

In the previous article, we introduced the method of obtaining file attributes and checking whether the file is readable, writable, and executable. If you are interested, you can click the link to insert → "php file operation: check whether the file is executable. Read/Write/Execute》. Next, this article will continue to talk about file attributes and look at how to obtain file time attributes.

The file contains three time attributes (information), namely: Creation time, Modification time and Last access time.

For example, the following text file named "test.txt", its creation time, modification time and last access time are as follows:

So how do we get the three file attributes? Don’t panic, PHP provides three functions to get them:

• filectime($filename): Returns the creation time of the file

• filemtime($filename): Returns the last modification time of the file

• fileatime($filename): Returns The last access time of the file

Let’s take a look at the following code example:

<?php
header("Content-type:text/html;charset=utf-8");
$file = "test.txt";
echo "文件创建时间为：".filectime($file);
echo "<br>文件修改时间为：".filemtime($file);
echo "<br>文件上次访问的时间为：".fileatime($file);
?>

Output result:

By outputting the results, you will find that the three functions filectime(), filemtime() and fileatime() return time in the form of Unix timestamp, which is not conducive to reading, we can use ## The #date() function processes the obtained time and formats it into the specified "Y-m-d H:i:s" format.

<?php
header("Content-type:text/html;charset=utf-8");
$file = "test.txt";
echo "文件创建时间为：".date(&#39;Y-m-d H:i:s&#39;,filectime($file));
echo "<br>文件修改时间为：".date(&#39;Y-m-d H:i:s&#39;,filemtime($file));
echo "<br>文件上次访问的时间为：".date(&#39;Y-m-d H:i:s&#39;,fileatime($file));
?>

Basic Operations of PHP Files

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