Returns the size of the file in bytes, or FALSE (and generates an error of level E_WARNING) in case of an error.
Bemærk: 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)).
Bemærk: Resultatet af denne funktion er cached. Se clearstatcache() for flere detaljer.
Vink: Fra og med PHP 5.0.0 kan denne funktion også bruges med nogle URL wrappers. Se Appendiks N for en liste over hvilke wrappers understøtter stat() familiens funktionalitet.
See also file_exists()