The filesize() function in PHP is an inbuilt function which is used to return the size of a specified file. The filesize() function accepts the filename as a parameter and returns the size of a file in bytes on success and False on failure.
The result of the filesize() function is cached and a function called clearstatcache() is used to clear the cache.
Parameters: The filesize() function in PHP accepts only one parameter $filename. It specifies the filename of the file whose size you want to check.
Return Value: It returns the size of a file in bytes on success and False on failure.
Errors And Exception:
- For files which are larger than 2GB some filesystem functions may return unexpected results since PHP’s integer type is signed and many platforms use 32bit integers.
- The buffer must be cleared if the filesize() function is used multiple times.
- The filesize() function emits an E_WARNING in case of a failure.
Input : echo filesize("gfg.txt"); Output : 256 Input : $myfile = 'gfg.txt'; echo $myfile . ': ' . filesize($myfile) . ' bytes'; Output : gfg.txt : 256 bytes
Below programs illustrate the filesize() function.
gfg.txt : 256 bytes