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To get the keys of an array if the value is not null

I have an array like and used array_keys to get the keys:

$arr =  array(  1 => 1,
        2 => 3,
        3 => 2,
        5 => 0,
        6 => 0 );

$new_arr = array_keys($arr);

Now I want to get array_keys if the value is not null. How can i do this?

Please, help.

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3 answers


Run array_filter

on your array before you get the keys; which removes the 0 values ​​and you only get the keys you need.

$new_arr = array_keys(array_filter($arr));


Output

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)
+6


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You can remove all elements with values ​​before passing the array to array_keys

:

NULL
null
''
0


With the following:

array_filter($array, function($var) {
  // Remove all empty values defined in the above list.
  return !is_empty($var);
});
0


source 


$num_array = array(1,2,3,4,0,0);
$zero_val  = array_keys($num_array,!0);
print_r($zero_val);
0


source






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