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                            * 描述：為圖像分配透明顏色imagecolorallocatealpha()
* 語法：

```
int imagecolorallocatealpha ( resource $image , int $red , int $green , int $blue , int $alpha )
```
* 說明：imagecolorallocatealpha() 的行為和 imagecolorallocate() 相同，但多了一個額外的透明度參數 alpha，其值從 0 到 127。0表示完全不透明，127 表示完全透明。

![](https://img.kancloud.cn/bf/f4/bff4e573ab268b428dd42bb23f04be4f_800x335.png)
![](https://img.kancloud.cn/66/05/660588714cb80185f56ca4cde9770a2f_629x384.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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