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                            ## 數組維度
> array_depth($arr = [],$rule_depth=null)

獲取/判斷數組維度

| 參數 | 類型 | 必須 | 說明 |
| --- | --- | --- | --- |
| `$arr ` | array | 是 | 判斷數組 |
| `$rule_depth` | null/int | 否 | 規則維度，不傳則返回數組維度|傳入則校驗數組是否該維度 |

> 示例：
~~~
$arr=['qwe'=>123,'asd'=>['zxc'=>456]];
var_dump(array_depth($arr));    // 2
var_dump(array_supp($arr,2));    // true
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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