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                            在商城的二次開發過過程,通過下面的方法,可以判斷用戶是否購買過某個商品,
這樣就可以做相關的輸出處理,
比如顯示有哪些權限, 下載 或者是瀏覽內容
又或者把購買菜單隱藏掉,又或者是把購買菜單變成是否再次購買的提示

~~~
{if fun('shop@buynum',$id)}
已購買過
{else /}
還沒購買過
{/if}
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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