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                            ZBPHP應用公共（函數）

## is_signin

     is_signin — 判斷管理員是否登錄

### 參數：

    無

### 返回值

    返回一個INT類型數值，檢測沒有登錄的情況下返回0，登錄返回用戶的ID

### 錯誤／異常

    未知異常

### 范例

~~~
<?php
    // 檢測用戶是否登錄
    if(is_signin()){
        // 已登錄
    }else{
        // 未登錄
    }
?>
~~~




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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