<?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);
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- array(1) {
[0]=>
string(10) "country_id"
}
preferences:
220.32 ms | 405 KiB | 322 Q