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$arr = array(0 => 'aa',
1 => 'bb',
2 => 'cc',
3 => array(0 => 'one', 1 => 'two'));
$conf = &$arr;
foreach ($conf as $c) {
if(is_array($c)) {
array_splice($c, 1);
// unset($c[1]);
}
}
print_r($arr);
for($i = 0; $i < count($conf); $i++) {
if(is_array($conf[$i])) {
array_splice($conf[$i], 1);
}
}