mysqlnd_get_backtrace 790 mysqlnd/mysqlnd_debug.c mysqlnd_get_backtrace mysqlnd_get_backtrace 77 mysqlnd/mysqlnd_debug.h PHPAPI char * mysqlnd_get_backtrace(uint max_levels, size_t * length TSRMLS_DC); mysqlnd_get_backtrace 544 mysqlnd/mysqlnd_result.c char *backtrace = mysqlnd_get_backtrace(TSRMLS_C);