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# filesize

(PHP 3, PHP 4 , PHP 5)

filesize -- Gets file size

## Description

int filesize ( string filename)

Returns the size of the file in bytes, or `FALSE` in case of an error.

> 備注: Because PHP's integer type is signed and many platforms use 32bit integers, filesize() may return unexpected results for files which are larger than 2GB. For files between 2GB and 4GB in size this can usually be overcome by using sprintf("%u", filesize($file)).

> 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.

示範 1.filesize() example
`<?php // outputs e.g. somefile.txt: 1024 bytes $filename = 'somefile.txt'; echo $filename . ': ' . filesize($filename) . ' bytes'; ?>`

See also file_exists()

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