- array_map: documentation ( source)
- print_r: documentation ( source)
- explode: documentation ( source)
- array_filter: documentation ( source)
<?php
$arr = array (
'expert_skills' => ',1,2,3,7',
'inter_skills' => ',9,10,7,8,9',
'beginner_skills' => ',6,8'
);
$arr = array_map(function ($v) {
return array_filter(explode(',', $v));
}, $arr);
print_r($arr);