ErrorException [ Fatal Error ]: Call to undefined function mb_substitute_character()

SYSPATH/classes/Kohana/UTF8.php [ 74 ]

69 			$var = UTF8::strip_ascii_ctrl($var);
70 
71 			if ( ! UTF8::is_ascii($var))
72 			{
73 				// Temporarily save the mb_substitute_character() value into a variable
74 				$mb_substitute_character = mb_substitute_character();
75 
76 				// Disable substituting illegal characters with the default '?' character
77 				mb_substitute_character('none');
78 
79 				// convert encoding, this is expensive, used when $var is not ASCII

  1. {PHP internal call} » Kohana_Core::shutdown_handler()

Environment