I have an array which generated using PHP as below:

```
Array ( 
    [0] => Array ( [user] => test 1 [esttime] => 5 mins [destination] => testing location svvfefhsrdfd ) 
    [1] => Array ( [user] => test 2 [esttime] => 5 mins [destination] => testing location fsdfdsv  ) 
    [2] => Array ( [user] => test 5 [esttime] => 8 mins [destination] => testing location scvvfe ) 
    [3] => Array ( [user] => test 3 [esttime] => 5 mins [destination] => testing location sfds) 
    [4] => Array ( [user] => test 4 [esttime] => 8 mins [destination] => testing location gfsdarr ) 
    [5] => Array ( [user] => test 6 [esttime] => 10 mins [destination] => testing location dgfd ) 
)

```

the array have keys user,estimate time and destination and related values, i need to sort this array using esttime key value. 

i tried many ways, but couldn't able to find a way. 

anyone know how to sort this array using php, thank you