How to get the modification time of an image file in php

The filectime() function can be used in PHP to obtain the modification time of the image file. This function can return the last modification time of the specified file, and the syntax format is "filectime(filename)". The return value of this function is in the form of a Unix timestamp, which can be formatted as a local date and time using the date() function.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php gets the modification time of the image file

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
echo "上次修改（Unix 时间戳形式）: ".filemtime("1.jpg");
echo "<br />";
echo "上次修改: ".date("Y-m-d H:i:s",filemtime("1.jpg"));
?>

Output:

上次修改（Unix 时间戳形式）: 1616986438
上次修改: 2021-03-29 10:53:58

Related function introduction:

filectime() function returns the last modification time of the specified file, which can be used Returns the time when the file contents were last modified.

This function will check the daily modification of the file and the inode modification. Inode modification refers to: modification of permissions, modification of owner, modification of user group or modification of other metadata. The syntax is as follows:

filectime(filename)

Parameters:

• filename: required. Specifies the documents to be checked.

Return value:

• If successful, this function will return the last modification time of the file in the form of a Unix timestamp. On failure, returns FALSE.

Note:

• #The result of this function will be cached, and you need to use clearstatcache() to clear the cache.

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