How to increase PHP memory in WordPress

We are hosting numerous client websites using WordPress, and sometimes a WordPress Memory Exhausted error shows up when activating a new plugin or doing some other task. Usually the error looks like this:

1 Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 2348617 bytes) in /home4/xxx/public_html/wp-includes/plugin.php on line xxx

We got an email from a user who was facing the same problem, so we decided to do a writeup on it because this is a common problem. The reason why this error shows up is because you exceed your default Memory Limit.

Increasing PHP memory limit

First open your wp-config.php which is located in the root WordPress directory. Then add the following line inside the main php tag:

1 define('WP_MEMORY_LIMIT''64M');

We just increased the memory limit to 64M. If you still get the error after this fix, then please contact your host. Most likely, they would have to go in their php.ini file to increase the memory limit for you. If you have other ways of increasing the memory limit, then let us know in the comments below.

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