UNI_REPLACEMENT_CHAR  139 ext/json/ext/generator/unicode.c                     unicode_escape(buffer, UNI_REPLACEMENT_CHAR);
UNI_REPLACEMENT_CHAR  173 ext/json/ext/generator/unicode.c                 unicode_escape(buffer, UNI_REPLACEMENT_CHAR);
UNI_REPLACEMENT_CHAR  135 ext/json/ext/parser/unicode.c             ch = UNI_REPLACEMENT_CHAR;