Article ID: 120633, created on Mar 20, 2014, last review on May 10, 2014

  • Applies to:
  • Plesk for Linux/Unix


  1. Domain shows blank page.
  2. From domain log:

    # tail -f /var/www/vhosts/domain.tld/logs/error_log
    mod_fcgid: stderr: PHP Fatal error:  Call to undefined function filter_var() in /var/www/vhosts/domain.tld/httpdocs/includes/functions.php on line 896


PHP filter module is not enabled:

    [root@test]# php -m |grep filter


  1. Make sure that PHP 5.2 or higher version is installed, because function filter_var is supported since PHP 5.2.0:

  1. Make sure tha PHP filter module is enabled after PHP upgrade:

[root@test]# php -m |grep filter filter

Or follow PHP instruction to enable this module:

Search Words

login fails

a914db3fdc7a53ddcfd1b2db8f5a1b9c 56797cefb1efc9130f7c48a7d1db0f0c 29d1e90fd304f01e6420fbe60f66f838

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