Reply To: Limit on amount of data in text field?

• emcniece

• April 17, 2014 at 8:13 am

Both usermeta.meta_value and postmeta.meta_value are stored as LONGTEXT. Here’s how the MySQL docs describe the size of a LONGTEXT data type:

“A TEXT column with a maximum length of 4,294,967,295 or 4GB (232 – 1) characters. The effective maximum length is less if the value contains multi-byte characters. The effective maximum length of LONGTEXT columns also depends on the configured maximum packet size in the client/server protocol and available memory.

HOWEVER, ACF fields are stored by passing these values by $_POST to the server, so you might be getting hit on PHP’s post_max_size limit. This can be updated in a few different places:

php.ini:

post_max_size=20M
upload_max_filesize=20M

.htaccess:

php_value post_max_size 20M
php_value upload_max_filesize 20M

It might be worth trying some larger values on those variables and testing submissions of different lengths.