I am using cPanel of my website to increase maximum upload file size for wordpress media uploads. I have used the codes(found out from google) for this purpose wp-config.php, .htaccess but nothing is working. In my cPanel, there is no service for php configuration editor under software / services section or anywhere else. Please help what should I do?

My .htaccess shows this code: 

```
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

```

I tried by placing the code:

```
php_value upload_max_filesize 20M
php_value post_max_size 20M

```

inside and outside # blocks, it gives 500 error rather.