php - From Two Dimensional Array To One Dimensional Array? -

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Hey, I'm using fuel PHP and I am doing this ... 

 < Code> $ query = \ DB :: Choose ('Username') - & gt; From ('Users') - & gt; Execute () - & gt; As_array ();   
 I'm getting the array as shown below.  
  Array ([0] => Array ([username] = & gt; daGrevis) [1] = & Gt; array ([username] => whatever) [2] = & gt; Array ([user name] => foobar))   
 It is definitely not what I want. Here is an example of "ideal array" for me:  
  Array ([0] => Dagrevis [1] => whatever [2] => Fobar)   
 How can I get an "ideal array"? Maybe I'm doing something wrong in the query ... if not ... how can I convert array # 1 to array # 2? Maybe using loops? Or does it have built-in function? I'm confused.   
 
 
 You can do it originally with fuel:  
  $ Query = \ DB :: Choose ('Username') - & gt; From ('Users') - & gt; Execute () - & gt; As_array (null, 'username');   
 This will do what you want.

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