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                            # PHP cal_days_in_month() 函數



## 定義和用法

cal_days_in_month() 函數針對指定的年份和日歷，返回一個月中的天數。

### 語法

```
cal_days_in_month(calendar,month,year)
```

| 參數 | 描述 |
| --- | --- |
| calendar | 必需。規定要使用的歷法。 |
| month | 必須。規定月。 |
| year | 必須。規定年。 |

## 例子

```
<?php
$d=cal_days_in_month(CAL_GREGORIAN,10,2005);
echo("There was $d days in October 2005");
?>
```

輸出：

```
There was 31 days in October 2005
```




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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