Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback, cannot access "self" when no class scope is active in /var/www/vhosts/kddi-hikari.com/lib/functions.php:251 Stack trace: #0 /var/www/vhosts/kddi-hikari.com/lib/functions.php(251): array_map() #1 /var/www/vhosts/kddi-hikari.com/lib/functions.php(316): myhtmlspecialchars() #2 /var/www/vhosts/kddi-hikari.com/lib/tag.php(30): getGTMTag() #3 /var/www/vhosts/kddi-hikari.com/lib/common.php(15): include_once('...') #4 /var/www/vhosts/kddi-hikari.com/index.php(3): include_once('...') #5 {main} thrown in /var/www/vhosts/kddi-hikari.com/lib/functions.php on line 251