013+ string(10) "string_val"
014- Warning: mb_ereg_replace(): Pattern is not valid under UTF-8 encoding in %s on line %d
015- bool(false)
016-
019+ string(10) "string_val"
022- Warning: mb_ereg_replace(): Pattern is not valid under UTF-8 encoding in %s on line %d
023- bool(false)
024-