PHP Array and unset function -


i have array this.

    array     (         [0] => array             (                 [email] => abc@gmail.com                 [timestamp] => 2013-05-03 09:20:01             )          [1] => array             (                 [email] => def@gmail.com                 [timestamp] => 2013-05-03 09:20:23             )          [2] => array             (                 [email] => ghi@gmail.com                 [timestamp] => 2013-05-03 09:20:43             )      )

i want simple this. 

    array     (         [0] => abc@gmai1.com         [1] => def@gmail.com         [2] => ghi@gmail.com     )

i have tried unset function still doesn't work expected.

i not big array concept , hence stupid questions !!! :(

foreach($foo $key=>$value) {   $foo[$key] = $value['email']; }

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