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# filemtime

(PHP 3, PHP 4 , PHP 5)

filemtime -- Gets file modification time

## Description

int filemtime ( string filename)

Returns the time the file was last modified, or `FALSE` in case of an error. The time is returned as a Unix timestamp, which is suitable for the date() function.

> 備注:此函數的結果會被快取。詳細資訊請參考 clearstatcache()。

> 心得:As of PHP 5.0.0 this function can also be used with some URL wrappers. Refer to 附錄 L for a listing of which wrappers support stat() family of functionality.

This function returns the time when the data blocks of a file were being written to, that is, the time when the content of the file was changed.

示範 1.filemtime() example
`<?php // outputs e.g. somefile.txt was last modified: December 29 2002 22:16:23. $filename = 'somefile.txt'; if (file_exists($filename)) { echo "$filename was last modified: " . date ("F d Y H:i:s.", filemtime($filename)); } ?>`

See also filectime(), stat(), touch(), and getlastmod().

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