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>在循環時,我們需要查看每次循環的值,還不想等全部循環完,在輸出值,可以用此方法

1. 每次都清空緩存



| code|作用|
|---|---|
|`ob_start()` |	開啟ob緩存|
|`ob_get_contents()` |	獲取ob緩存內容|
|`ob_clean()` |	清空ob緩存內容，不關閉ob緩存|
|`ob_end_clean()` |	清空ob緩存內容，并關閉ob緩存|
|`ob_flush()` |	將ob緩存的內容強制輸出到程序緩存，不關閉ob緩存,不在ob_get_content中|
|`ob_end_flush()` |	將ob緩存的內容強制輸出到程序緩存，并關閉ob緩存|
|`flush()` |	將數據強制輸出至客戶端 |
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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