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                            ![](https://img.kancloud.cn/cf/e0/cfe0c5a2a427589ca58febccc2c89b63_1000x592.png)
## 1、__toString()
* 描述：將對象轉成字符串時，__toString()會自動調用。
* 語法：

```
public string __toString ( void )
```
* 注意：PHP不支持對象轉字符串，因此，不能使用echo輸出一個對象

![](https://img.kancloud.cn/65/9d/659df7a6c36c6f5201d675d369b732e0_705x375.png)
## 2、__invoke()
* 描述：當把一個對象當成函數調用時，__invoke()會自動調用。
* 語法：

```
mixed __invoke ([ $... ] )
```
![](https://img.kancloud.cn/3e/1d/3e1d8d604ef218f9a27b650d18675787_703x373.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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