Do not use readline when not having a tty

This is important for e.g. run-tests.php

Author: bwoebi

sapi/phpdbg/phpdbg.c

@@ -564,7 +564,7 @@ static PHP_FUNCTION(phpdbg_end_oplog)
 					last_function = op_array->function_name;
 					last_scope = op_array->scope;
 					if (last_scope == NULL) {
-						fn_name = zend_string_copy(last_function ? last_function : last_file);
+						fn_name = zend_string_copy(last_function);
 					} else {
 						fn_name = strpprintf(ZSTR_LEN(last_function) + ZSTR_LEN(last_scope->name) + 2, "%.*s::%.*s", ZSTR_LEN(last_scope->name), ZSTR_VAL(last_scope->name), ZSTR_LEN(last_function), ZSTR_VAL(last_function));
 					}

sapi/phpdbg/phpdbg_cmd.c

@@ -716,7 +716,7 @@ PHPDBG_API char *phpdbg_read_input(char *buffered) /* {{{ */
 #define USE_LIB_STAR (defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDIT))
 			/* note: EOF makes readline write prompt again in local console mode - and ignored if compiled without readline */
 #if USE_LIB_STAR
-			if (PHPDBG_G(flags) & PHPDBG_IS_REMOTE)
+			if ((PHPDBG_G(flags) & PHPDBG_IS_REMOTE) || !isatty(PHPDBG_G(io)[PHPDBG_STDOUT].fd))
 #endif
 			{
 				phpdbg_write("prompt", "", "%s", phpdbg_get_prompt());