Solution 1: First edit the PHP.ini file

Suppose if you are not allowed to edit your PHP.ini file, update your memory_limit in PHP.ini by modifying the below line

memory_limit = 64M ; Maximum amount of memory a script may use (64MB)

If the specified line is showing 64M in default, change it to 128M.

Solution 2: Second step is edit the .htaccess file

Add the follwing script below to your .htaccess file.

php_value memory_limit 64M

Solution 3: In step 3 edit the wp-config.php file

Add the following script below to your wp-config.php file

Increase the memory allocated to PHP

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

Solution 4: Now create a PHP.ini file to the wp-admin folder

•     First open the Notepad.
•     Insert the following code into Notepad.
•     memory_limit = 64M ;
•     Save as "PHP.ini".
•     Upload the created file to "wp-admin" directory using file manager or via ftp.

A simple tip from
Ultimatecine.com