PHP filemtime () function
Definition and Usage
filemtime () function returns the contents of the file was last modified.
If successful, the function will return a Unix timestamp in the form of file content was last modified. If it fails, it returns FALSE.
grammar
filemtime(filename)
参数 | 描述 |
---|---|
filename | 必需。规定要检查的文件。 |
Tips and Notes
Note: The results of this function are cached.Use clearstatcache () to clear the cache.
Examples
<?php
echo filemtime("test.txt");
echo "<br />";
echo "Last modified: ".date("F d Y H:i:s.",filemtime("test.txt"));
?>
echo filemtime("test.txt");
echo "<br />";
echo "Last modified: ".date("F d Y H:i:s.",filemtime("test.txt"));
?>
The code above will output:
1139919766
Last modified: February 14 2006 13:22:46.
Last modified: February 14 2006 13:22:46.
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