PHP轻量级数据库操作类Medoo增加、删除、修改、查询例子

Medoo介绍

Medoo是一款超轻量级的PHP SQL数据库框架，由社交网站Catfan和开源项目Qatrix的创始人黎言卓开发。提供了简单，易学，灵活的API，提升开发Web应用的效率与性能，而且体积只有8KB不到。

特性

轻量级，只有一个文件

简单易学，数据结构一目了然

支持多种SQL语法，以及支持复杂的查询条件

支持多种数据库，包括MySQL, MSSQL, SQLite等等

安全，可防止SQL注入

免费，基于MIT协议

示例代码

增加

代码如下:
$database = new medoo ( "my_database" );

$last_user_id = $database->insert ( "account", [
  "user_name" => "foo",
  "email" => "foo@bar.com",
  "age" => 25,
  "lang" => [
    "en",
    "fr",
    "jp",
    "cn"
  ]
] );

删除
代码如下:
$database = new medoo ( "my_database" );
    
$database->delete("account", [
    "AND" => [
    "type" => "business"
    "age[<]" => 18
    ]
]);

修改

代码如下:
$database = new medoo ( "my_database" );

$database->update ( "account", [
  "type" => "user",
  
  // All age plus one
  "age[+]" => 1,
  
  // All level subtract 5
  "level[-]" => 5,
  
  "lang" => [
    "en",
    "fr",
    "jp",
    "cn",
    "de"
  ]
], [
  "user_id[<]" => 1000
] );

查询

代码如下:
$database = new medoo ( "my_database" );

$datas = $database->select ( "account", [
  "user_name",
  "email"
], [
  "user_id[>]" => 100
] );

// $datas = array(
// [0] => array(
// "user_name" => "foo",
// "email" => "foo@bar.com"
// ),
// [1] => array(
// "user_name" => "cat",
// "email" => "cat@dog.com"
// )
// )

foreach ( $datas as $data ) {
 echo "user_name:" . $data ["user_name"] . " - email:" . $data ["email"] . "<br>";
}

// Select all columns
$datas = $database->select ( "account", "*" );

// Select a column
$datas = $database->select ( "account", "user_name" );
    
    // $datas = array(
    // [0] => "foo",
    // [1] => "cat"
    // )