Making well written classes

programming
1

This is my first foray into writing classes in any language. I’m trying to be a better programmer and want to make sure that the way I’m coding is considered ‘kosher’ or best practice.

Would anyone mind looking over this class I wrote and giving me any pointers as to where I could improve it?

<?php

class TableField {

private $name;
private $input;

}

class ProductField extends TableField {
    
    public $perishable;

    public function setProductName($product_name){
        $this->name = $product_name;
    }

    public function setProductPerishable($product_perishable){
        $this->perishable = $product_perishable;
    }

    public function addProduct(){
        global $con;
        global $db_name;
        mysql_select_db($db_name, $con);
        mysql_query("INSERT INTO products (name, perishable) VALUES ('$this->name', '$this->perishable')");
        echo "Product Added";
        echo $this->name;
        echo $this->perishable;
        echo $db_name;
        mysql_close($con);
    }
}

?>