write full require

composer.json

@@ -14,6 +14,8 @@
  }
  ],
  "minimum-stability": "alpha",
- "require": {},
+ "require": {
+ "ext-pdo": "*"
+ },
  "license": "MIT"
 }

src/Sqlbatis.php

@@ -1,8 +1,9 @@
 <?php
 
 namespace Gengbin\Sqlbatis;
-
-abstract class Sqlbatis{
+use PDO;
+use PDOException;
+abstract class Sqlbatis implements SqlbatisInterface {
  abstract function construct($connectData='',$userName='',$userPassword=''):array;
 
  function resource(): array
@@ -60,4 +61,4 @@ function exec($sql): array
  }
  return $data;
  }
-}
+}

src/SqlbatisInterface.php

@@ -0,0 +1,13 @@
+<?php
+
+
+namespace Gengbin\Sqlbatis;
+
+
+interface SqlbatisInterface
+{
+ function construct($connectData='',$userName='',$userPassword=''):array;
+ function resource(): array;
+ function query($sql=''): array;
+ function exec($sql): array;
+}