BaseModel ORM prototype for php

BaseModel_ORM_prototype.php

<?php

class BaseModel
{
    protected $tableName = '';
    private $columnNames = []; // ['id' => 'int', ...]
    private $attrNames = [];
    // private $attrValues = [];  // ['id' => 1, ...]
    private $attrFuncNames = [];

    protected function startsWith($haystack, $needle) {
        return strncmp($haystack, $needle, strlen($needle)) === 0;
    }

    public function __call($funcName, $params) {
        if(in_array($funcName, $this->attrFuncNames)) {
            $this->invokeGetterSetter($funcName, $params);
        } else {
            echo 'Base 未知方法'.$funcName .', params: '.json_encode($params). PHP_EOL;
        }
    }

     public function __construct($attrValues = []) {
         echo 'Base '.$this->tableName.'初始化' .json_encode($attrValues) . PHP_EOL;
         $this->defineAttrs();
         foreach (array_keys($attrValues) as $key) {
             // $this->$key = $attrValues[$key];
             $this->setAttr($key, $attrValues[$key]);
         }
    }

    protected function setAttr($name, $value) {
        if(in_array($name, array_keys($this->columnNames))) {
            // echo 'Base 定义属性方法' . $name . ' '. $attrType . $value . PHP_EOL;
            array_push($this->attrNames, $name);
            $attrType = $this->columnNames[$name];
            if (isset($value) && ($attrType == 'float')) {
                $this->{$name} = (float)$value;
                echo 'Base '.$name.'类型转换为 '.$this->{$name}.' '.$attrType . PHP_EOL;
            } elseif ($this->columnNames[$name] == 'int') {
                $this->{$name} = (int)$value;
            } else {
                $this->{$name} = $value;
            }
        } else {
           echo 'Skip unknown attr: '.$name.PHP_EOL;
        }
    }

    protected function invokeGetterSetter($funName, $params)
    {
        // $this->$funcName = ( function($params) use($funcName)
        echo 'Base 调用方法'.$funName.', params: '.json_encode($params) . PHP_EOL;
        if ($this->startsWith($funName, 'get')) {
            $columnName = strtolower(preg_replace('/get/', '', $funName));
            echo 'Base '.$funName.'(): '.$this->$columnName . PHP_EOL;
        } else if ($this->startsWith($funName, 'set')) {
            $columnName = strtolower(preg_replace('/set/', '', $funName));
            $this->setAttr($columnName, $params[0]);
            echo 'Base '.$funName.'(): '.$params[0] . PHP_EOL;
        } else {
            echo '未定义方法'.$funName . PHP_EOL;
        }
    }

    public function attrs() {
        $keyValues = [];
        foreach (array_keys($this->columnNames) as $key) {
            $keyValues[$key] = $this->$key;
        }
        echo "Base attrs: ".json_encode($keyValues) . PHP_EOL;
        return $keyValues;
    }

    public static function all() {
        // 从数据表结构查询, for example
        $cows = [
            ['id' => 1, 'name' => 'name1', 'price' => '1.1'],
            ['id' => 2, 'name' => 'name2', 'price' => '2.2']
        ];
        $class = get_called_class();
        // echo 'get_called_class(): '. $class . PHP_EOL;
        return [
            new $class($cows[0]), new $class($cows[1]),
        ];
    }

    protected function defineAttrs() {
        if ($this->tableName == 'coupons') {
            // 从数据表结构查询到的字段为 name, price
            $this->columnNames = ['id' => 'int', 'name' => 'string', 'price' => 'float'];
            $this->attrFuncNames = ['getId', 'setId', 'getName', 'setName', 'getPrice', 'setPrice'];
            foreach (array_keys($this->columnNames) as $key) {
                $this->setAttr($key, null);
            }
        }
    }
}

class Coupon extends BaseModel {
    protected $tableName = 'coupons';

}

echo 'New Coupon1-----------'. PHP_EOL;
$coupon1 = new Coupon(['name' => 'name1', 'price' => '1.1', 'test' => 'sdf']);
echo '$coupons1 get_class: '.get_class($coupon1) . PHP_EOL . PHP_EOL;
//echo 'Coupon get_class_vars' . PHP_EOL;
//print_r(get_class_vars('Coupon'));
//echo 'Coupon get_class_methods' . PHP_EOL;
//print_r(get_class_methods('Coupon'));
echo 'New Coupon2-----------'. PHP_EOL;
$coupon2 = new Coupon(['name' => 'name2', 'price' => '2.2']);
echo 'Coupon methods--------'. PHP_EOL . PHP_EOL;
$coupon = Coupon::all()[0];
echo '$coupons[0] get_class: '.get_class($coupon) . PHP_EOL . PHP_EOL;
$coupon->attrs();
$coupon->setPrice('3.3');
$coupon->attrs();

输出结果:
New Coupon1-----------
Base coupons初始化{"name":"name1","price":"1.1","test":"sdf"}
Base price类型转换为 1.1 float
Skip unknown attr: test
$coupons1 get_class: Coupon

New Coupon2-----------
Base coupons初始化{"name":"name2","price":"2.2"}
Base price类型转换为 2.2 float
Coupon methods--------

Base coupons初始化{"id":1,"name":"name1","price":"1.1"}
Base price类型转换为 1.1 float
Base coupons初始化{"id":2,"name":"name2","price":"2.2"}
Base price类型转换为 2.2 float
$coupons[0] get_class: Coupon

Base attrs: {"id":1,"name":"name1","price":1.1}
Base 调用方法setPrice, params: ["3.3"]
Base price类型转换为 3.3 float
Base setPrice(): 3.3
Base attrs: {"id":1,"name":"name1","price":3.3}