- array_map: documentation ( source)
- print_r: documentation ( source)
- implode: documentation ( source)
<?php
$input = array(
array(
'username' => 'matt'
),
array(
'username' => 'matt'
)
);
print_r ($input);
echo implode(', ', array_map(function ($entry) {
return $entry['username'];
}, $input));