- var_dump: documentation ( source)
- array_filter: documentation ( source)
- array_keys: documentation ( source)
<?php
function lambda_filter_empty($entry) {
return ($entry !== '');
}
$test = array(
'country_id' => '1',
'state' => '',
'city' => '',
'address1' => '',
);
$result = array_keys(array_filter($test, "lambda_filter_empty"));
var_dump($result);