Replacing images with PHP

[dele454]

Hi,

I was thinking if i need to replace an image on the server with an uploaded version, does it follow the same fopen+fwrite functions calls like writing/appending a string to a txt file?

My other option is to delete the existing file and replace it with the uploaded version with the same name but i want to know if one cant simply replace it rather than deleting+replacing.

I cant seem to find any clues on the internet.

Thanks

[logic_earth]

if you open the files using fopen be sure to do so using binary mode.
http://us.php.net/manual/en/function.fopen.php
$fo = fopen( 'image.jpg', 'br' );

However, for binary data like an image it is best to just overwrite the old image with the new one.

[dele454]

Thanks Logic_Earth

[dele454]

writing to the jpg file doesnt work as expected. The file size of the replaced image drops to 13bytes and image cannot be previewed.

I have switched to delete the existing image and replacing with a new one - just seems simpler and less hassling.

Thanks

[dele454]

Just read in the documentation that move_uploaded_file function overwrites the file with the same name if it does exist.

http://uk.php.net/move_uploaded_file