Are there any way to increase PHP memory limit

To address memory limit issues, there are two paths:

• Adjust it yourself
• Contact your hosting company

1.?Edit your wp-config.php file and enter something like:

define('WP_MEMORY_LIMIT', '96M');

WordPress memory can be different to the server ? you need to set this regardless of server memory settings

https://codex.wordpress.org/Editing_wp-config.php#Increasing_memory_allocated_to_PHP

2.?If you have access to your PHP.ini file, change the line in PHP.ini
If your line shows 32M try 64M:

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

3.?If you don?t have access to PHP.ini try adding this to an .htaccess file:

php_value memory_limit 64M

4.?If none of the above works then talk to your host.