filesize from a String

Question

how can i get the \"filesize\" from a string in php?

I put the string in a mysql database as a blob and i need to store the size of the blob. My solution was to create

Answer 1

SELECT length(field) FROM table

From the MySQL docs:

LENGTH(str)

Returns the length of the string str, measured in bytes. A multi-byte character counts as multiple bytes. This means that for a string containing five two-byte characters, LENGTH() returns 10, whereas CHAR_LENGTH() returns 5.