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                            nginx if 不允許嵌套，變量與括號之間都需要有空格，否則nginx認為是一條命令


| 符號 | 注釋 |
| --- | --- |
| =	 | 比較運算符,并非 "==" |
| &&	| 邏輯與 |
| or	| 邏輯或 |
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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