Symptom

I am unable to send attachments via webmail or upload big files with PHP scripts.

You are able to upload small files in webmail or with a PHP script, but larger files cannot be uploaded or you get "The page cannot be displayed" error when you push the "Send Message" button. If error reporting is enabled, you receive the "Allowed memory size of 8388608 bytes exhausted (tried to allocate 0 bytes)" or "Request Entity Too Large" error.

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PHP has several configuration options to limit resources consumed by scripts. By default, PHP is configured to upload files with size's up to 2MB.

Solution

Try to increase the following values in /etc/php.ini, for example:

memory_limit = 32M
upload_max_filesize = 24M
post_max_size = 32M

Save the file, then restart Apache.

/etc/init.d/httpd restart

Additional information

If the upload_max_filesize is larger than post_max_size, you must increase post_max_size so that it is bigger than upload_max_size.

If the value of post_max_size is larger than memory_limit, you must increase memory_limit so that it is larger than post_max_size.

Resources

• How can I edit php.ini file?
• Understanding basic vi (visual editor)
• php.net: Description of core php.ini directives