021+ 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-
031+ string(10) "string_val"
034- Warning: mb_ereg_replace(): Pattern is not valid under UTF-8 encoding in %s on line %d
035- bool(false)
036-