php - Combine array form set of values and keys -

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Hello everyone using php!

I am looking for an answer I have two arrays - the other array of indexes from individuals and person array. 

  person (array) selected index (array) [0] = & gt; 'Mark' [0] = & gt; 0 [1] = & gt; 'Jane' [1] = & gt; 2 [2] = & gt; 'Bob' [2] = & gt; 1 [3] = & gt; 'Jack'   
 I want to create a third array which contains elements from the  person  array which is set in the  selected indexes  array Are there. As in  SELECT * FROM, WHERE is the 'selected indexx' in the 'Person ID'  but in PHP if you know what I am saying?  
 I later use "forward" elements for the new array, but there is a small php solution eg inline?  
 Edit: Oh, and output should be:  
  selected person (array) [0] = & gt; 'Mark' [1] = & gt; 'Jane' [2] = & gt; 'Bob' (0, 2 and 1 only)    
 
 
  $ result = Array_intersect_key ($ people, array_flip ($ selected));

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