二维数组转换一位数组 不用foreach

<?php

$items = [

    ["ip"=>"10.1.1.3", "count"=>123],

    ["ip"=>"210.33.182.1", "count"=>34],

    ["ip"=>"82.12.193.2", "count"=>2],

    ["ip"=>"10.2.124.1", "count"=>20],

    ["ip"=>"10.1.1.3", "count"=>29],

    ["ip"=>"101unknow", "count"=>345],

    ["ip"=>"10.2.124.1", "count"=>20],

    ["ip"=>"10.80.19.92", "count"=>20],

];

echo "<pre>";

array_walk($items,function(&$value){

if(!preg_grep('/^(10|196|170)\\./',$value)){

$value = '';

} 

});

$arrFilter = (array_filter($items));

$arrMap = array_map(function($val){

print_r($val);

},$arrFilter);