sigh... need to include the null byte in hash keys

ext/pdo/pdo_stmt.c

@@ -502,6 +502,7 @@ static PHP_METHOD(PDOStatement, fetchAll)
 static int register_bound_param(INTERNAL_FUNCTION_PARAMETERS, pdo_stmt_t *stmt, int is_param)
 {
 	struct pdo_bound_param_data param = {0};
+	int name_strlen;
 
 	param.paramno = -1;
 	param.param_type = PDO_PARAM_STR;
@@ -509,7 +510,7 @@ static int register_bound_param(INTERNAL_FUNCTION_PARAMETERS, pdo_stmt_t *stmt,
 	if (stmt->dbh->placeholders_can_be_strings || !is_param) {
 		if (FAILURE == zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET,
 					ZEND_NUM_ARGS() TSRMLS_CC, "sz|llz!",
-					&param.name, &param.namelen, &param.parameter, &param.param_type,
+					&param.name, &name_strlen, &param.parameter, &param.param_type,
 					&param.max_value_len,
 					&param.driver_params)) {
 			if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "lz|llz!", &param.paramno,
@@ -517,6 +518,8 @@ static int register_bound_param(INTERNAL_FUNCTION_PARAMETERS, pdo_stmt_t *stmt,
 				return 0;
 			}	
 		}
+		/* since we're hashing this, we need the null byte too */
+		param.namelen = name_strlen + 1;
 	} else if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "lz|llz!", &param.paramno,
 			&param.parameter, &param.param_type, &param.max_value_len, &param.driver_params)) {
 		return 0;