How to define PHP memory limit in WordPress

Step 1: Log into your cPanel account.

Step 2: Open File Manager option and navigate to the Document Root of the website.

Step 3: Edit the wp-config.php file.

Step 4: Enter the below line above where it says /* That’s all, stop editing! Happy blogging. */.

define( ‘WP_MEMORY_LIMIT’, ’64M’ );

Step 5: Save the file.