php - get the size of a file stored on my database -

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i need size of pdf file stored in database

i try 

$sid = 1; $getfile = $db->prepare("select * pwork id=?"); $getfile->bind_param('i', $sid); if ($getfile->execute()) {     $fileres = $getfile->get_result();     if ($f = $fileres->fetch_object()) {         $filename = $f->work_file;         $filesize = filesize($filename);     } }

and got error

( ! ) warning: filesize(): stat failed ch03-libre.pdf in xxx on line 57

my file stored blob , need file size 5mb

if whole file inside blob, can use mysql functions directly calculate how big blob is.

see article: https://www.virendrachandak.com/techtalk/how-to-get-size-of-blob-in-mysql/

and example:

select octet_length(blob_content) test_blob id = 1

length returned in bytes.


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