- print_r: documentation ( source)
- str_replace: documentation ( source)
- array_walk: documentation ( source)
<?php
$array = array(
'user_id' => 1,
'user_name' => 'User',
'user_email' => 'mail@user.com'
);
array_walk($array,function($value, &$key) {
$newkey = str_replace("user_","",$key);
$newarray[$newkey] = $value;
});
print_r($newarray);