Edit your wp-config.php
file
Add this to the top, before the line that says, “Happy Blogging”:
define('WP_MEMORY_LIMIT', '1024M');
WordPress memory can be different from the server – you need to set this regardless of server memory settings
http://codex.wordpress.org/Editing_wp-config.php#Increasing_memory_allocated_to_PHP
Edit your PHP.ini file
If you have access to your PHP.ini
file, change the line in PHP.ini
If your line shows 64M try 1024M:
memory_limit = 1024M ; Maximum amount of memory a script may consume (64MB)
Edit your .htaccess
file
If you don’t have access to PHP.ini
try adding this to an .htaccess
file:
php_value memory_limit 1024M