file upload - PHP Fatal error: Out of memory (allocated 80740352) (tried to allocate 12352 bytes) in

Question

I get this error when users are uploading images on my site.

error msg is "PHP Fatal error: Out of memory (allocated 80740352) (tried to allocate 12352 bytes) in /home......." How can I fix this using php.ini?

Here is my current upload php.ini settings

upload_max_filesize = 2000M ;
post_max_size = 2000M
max_file_uploads = 8

Any ideas what else I need to add to solve this error?

Answer 1

The optimal memory_limit value depends on what you are doing with the uploaded files. Do you read the files into memory using file_get_contents or the GD library? In that case, increase memory_limit to at least the same as upload_max_filesize, preferably more.

If you are using GD, keep in mind that GD holds the entire image uncompressed in memory. This means that it takes memory in the range of width * height * bit-depth, e.g., 1024*768*32 = 25 165 824 bits = 3 MB for a screenshot, or as much as 55 MB for a 14 megapixel image.

Some operations may need to create a copy of the image, so consider setting memory_limit to the double of what you need to keep the image in memory. Also make sure to not load all images into memory at once if you don't have to. You can free the memory used by GD by calling imagedestroy on the handle when you are done working with the image.