I have 2 array , the second array must contain all the element in first array , how to check this ? Thank you

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For example

array 1: Array ( [0] => Email [1] => 1_Name )
array 2:  Array ( [0] => 1_Name [1] => ) 

In this case it is invalid , as array 2 do not have Email

array 1: Array ( [0] => Email [1] => 1_Name )
array 2:  Array ( [0] => 1_Name [1] => Address [2]=> Email )

 In this case it is valid 

```