how to assign elements of one array to another array in php

i retrieved data from my开发者_如何学Csql table in php

  $array2=array(); while($q1=  mysql_fetch_assoc($result))
{    print_r($q1);
    $array2[]= $q['user_id'];
}

the print_r($q1) will output this

Array ( [user_id] => 1 ) Array ( [user_id] => 2 ) Array ( [user_id] => 4 ) 

. Now i want to assign these values into another array i.e

 $array2[]=$q['user_id'];

but when i echo $array2 this gives me result otherthan $print_r($q) i.e

Array ( [0] => [1] => [2] => ) 

my question is how can i get the value of [user_id]=>4 from this array

---

$q is different from $q1..

You need:

$array2[]= $q1['user_id'];

It should actually be throwing a warning about $q['user_id'] not being defined. Do you have error reporting turned on?