我如何在PHP中实现类别-HowdoIimplementcategoriesinphp

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This is how your table look like

这就是你的桌子的样子

id | item_name  | parent_id | 
1  | Shoes      | 0         | 
2  | Jackets    | 0         | 
3  | Formal     | 1         | 
4  | Casuals    | 1         | 
5  | Party Wear | 2         | 

here you can see that your parent category has parent_id 0 and all the other sub categories are having id of their parent in parent_id column. In this way you can store your products in same table, differentiating them with parent_id

在这里,您可以看到您的父类别具有parent_id 0,而所有其他子类别在parent_id列中具有其父类别的ID。通过这种方式,您可以将产品存储在同一个表中,并使用parent_id区分它们

For example : Record 1 i.e Shoes is a parent and having parent_id 0, and record 3,4 are the sub categories of record 1, because they have parent id 1.

例如:记录1,即Shoes是父,并且parent_id为0,记录3,4是记录1的子类,因为它们具有父ID 1。