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                            ## 判斷數組包含
> array_in(array $arr = [],array $rule_arr = [])

判斷數組值是否在指定規則數組內（只針對一維數組），返回值為`bool`類型。

| 參數 | 類型 | 必須 | 說明 |
| --- | --- | --- | --- |
| `$arr` | array | 是 | 待判斷數組 |
| `$rule_arr ` | array | 是 | 規則數組 |

> 示例：
~~~
$arr=[1,2,3];
$ruleArr =[1,2,3,4,5];
var_dump(array_in($arr,$ruleArr ));    // true
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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