[英]Using 'if (isset($_GET' to retrieve composite key instead of primary key
If I was to get a primary key then I would do this: 如果要获取主键,则可以这样做:
if (isset($_GET['item_id']))
But if the table had a composite key (2 attributes that act as a primary key), how would I do this? 但是,如果表中有一个复合键(2个充当主键的属性),我该怎么做? My 2 attributes acting as a composite key are item_id and size_id
我的2个用作组合键的属性是item_id和size_id
If you need to access a row in your database with 2 attributes, then you need to be doing something like: 如果您需要使用2个属性访问数据库中的一行,则需要执行以下操作:
if (isset($_GET['item_id']) && isset($_GET('size_id')))
The other part can't magically appear unless you provide it in some other way. 除非您以其他方式提供,否则其他部分无法神奇地显示。
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