上传大文件时出现PHP致命错误

Question

I am currently using PHP CodeIgniter framework and have an image upload form. When I upload small files the script runs without any trouble, but when I select a file that's, lets say 3mb to upload, the script doesn't run, takes to a page and says "Page failed to load." I checked the php log and apache log. PHP log gave this error.

PHP Fatal error: 
Allowed memory size of 33554432 bytes exhausted
(tried to allocate 20736 bytes) in
/Users/Desktop/localhost/system/libraries/Image_lib.php on line 1155

I guess I have to change some settings from CodeIgniter's config file, is this a true assumption?

This is my current php.ini for PHP, which I think doesn't trigger the failure.

; Maximum allowed size for uploaded files. 
upload_max_filesize = 32M

; Must be greater than or equal to 
upload_max_filesize post_max_size = 32M

max_execution_time = 30     ; Maximum execution time of each script, in seconds
max_input_time = 60 ; Maximum amount of time each script may spend parsing request data
memory_limit = 32M      ; Maximum amount of memory a script may consume (8MB)

But the page doesn't load, then fail. It fails processing right when I click submit.

Any hints are appreciated, thanks in advance.

EDIT:

Now I get this error after changing themt o 64M, along with the memory_limit

PHP Fatal error:  Allowed memory size of 67108864 bytes
exhausted (tried to allocate 20736 bytes) in
/Users/Desktop/localhost/system/libraries/Image_lib.php on line 1155

Answer 1

Both of these directives will fail since the file size is > 32MB (as it's at least 33554432 bytes).

; Maximum allowed size for uploaded files. 
upload_max_filesize = 32M

; Must be greater than or equal to 
upload_max_filesize post_max_size = 32M

In addition, you will need to increase memory_limit.