Question

Possible Duplicate:
Is there a PHP function to remove any/all key/value pairs that have a certain value from an array?
Remove zero values from a PHP array

I have one array like this.

[notify_emp] => Array
  (
      [224] => 0
      [228] => 0
      [232] => 1
      [250] => 1
      [350] => 1
  )

I want only those keys from the array which have value set to 1 and need to remove keys that have value 0.
how can I do this using create_function in php ? or is there any other way to perform the action?

Answer 1

Try this:

<?php
function hasOne($var)
{
    // returns whether the input has 1
    return($var == 1);
}


$arr= array("224"=>1, "228"=>0, "250" => 1);

print_r(array_filter($arr, "hasOne"));
?>

Which results in:

Array ( [224] => 1 [250] => 1 )