- array_merge: documentation ( source)
<?php
$arr=array(
'key1'=>'value1',
'key2'=>'value2',
0=>array(
'sub1_key1'=>'sub1_value1',
'sub1_key2'=>'sub1_value2',
),
'key3'=>array(
'sub2_key1'=>'sub2_value1',
'sub2_key2'=>'sub2_value2',
),
);
$result = call_user_func_array('array_merge', $arr);