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                            ## require和include區別
******
* require()和include()語句是語言結構，不是真正的函數
*  _once后綴表示已加載的不加載


[TOC]


>[info] #### require 的介紹
* 文件只處理一次(意味著如果可能執行多次的代碼，則使用require()效率比較高)
* require的文件出錯了，主程序也停了


>[info] #### include 的介紹
* 在執行文件時每次都要進行讀取和評估
* include的文件中出錯了，主程序繼續往下執行
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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