pcre_get_substring  615 ext/pcre/pcrelib/pcre.h PCRE_EXP_DECL int  pcre_get_substring(const char *, int *, int, int,
pcre_get_substring  625 ext/pcre/pcrelib/pcre_get.c return pcre_get_substring(subject, ovector, stringcount, n, stringptr);