php函数功能将二维数组转成一维数组

<?php

function multi2array($data){
    $one = [];

    foreach ($data as $value) {
        foreach ($value as $v) {
            $one[] = $v;
        }
    }
    return $one;
}

$data = [
    [67,2,86],
    [1,85,6]
];

$new_arr = multi2array($data);

print_r($new_arr);

<?php
header("content-type:text/html;charset=gb2312");
function multi2array($data){
  $a=array_reduce($data,'array_merge',array());
  return $a;
}
$data=array(array(67,2),array(86,1),array(85,6));
$new_arr=multi2array($data);
print_r($new_arr);
?>