Nothing is added into my /var/log/php_errors.log when the white screen occurs.
Why the white screen doesn't return or log any errors?
In my /etc/php5/apache2/php.ini I have:display_errors = On, log_errors = On error_log = /var/log/php_errors.logphpinfo() returns the same values/var/log/php_errors.log does log some errors in other pages
In my [Prestashop_dir]/config/defines.inc.php I have define('_PS_MODE_DEV_', true);
and in smartyadmin.config.inc.php I also added $smarty->debugging = true;
URL of the page that is causing the white screen:
[Prestashop_backend_url]/index.php?controller=AdminPdf&token=d10cf8b3819b0922610f36caf0e37c24&submitAction=generateDeliverySlipsPDF&id_order=1
/var/log/apache2/access.log returns 200:
31.178.202.67 - - [11/Aug/2015:05:15:46 -0400] "POST /trzmiel4/admin4708/index.php?controller=AdminProducts&token=f4f509fc075d49764138165e9c0e4c4a&id_product=286&action=Suppliers&updateproduct&ajax=1&rand=1439284549458 HTTP/1.1" 200 1381 "http://188.210.220.115/trzmiel4/admin4708/index.php?controller=AdminProducts&id_product=286&updateproduct&token=f4f509fc075d49764138$764138165e9c0e4c4a" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.130 Safari/537.36"
but /var/log/php_errors.log remains silent
this is causing due to the limit of memory, pls increase the value of memory_limit in your php.ini config file. Prestashop admin products page requires more memory since it loads all the product images (admin product thumbnail - if its the first time you are accessing the admin products it will try to generate the product thumb images)