【原创】将数组按照固定格式输出内容

$arr = [

[

“name” => “电子产品”,

“children”=>[

       [

“name” => “手机”,

“children”=>[

               [

“name” => “安卓”,

“children”=>[

                       [

“name” => “小米”,

“children”=>[]

                       ],

                       [

“name” => “华为”,

“children”=>[]

                       ],

                     ]

               ],

               [

“name” => “苹果”,

“children”=>[]

               ]

           ]

       ],

       [

“name” => “笔记本电脑”,

“children”=>[]

       ]

]

],

[

“name” => “服装”,

“children”=>[

        [

“name” => “上衣”,

“children”=>[]

        ]

 ]

]];

将以上数组，按照最下面的固定格式进行输出：

public function dealArr($arr, $i=0){

    $str = ”;

    $start = $i;  // 严格定义层级，不受+1的限制

    if($start == 0){

        $str = PHP_EOL;  // 一开始需要换行处理

    }

    foreach($arr as $key=>$val){

        // 需要添加的空格

        $brNum = “”;

        for($j=0; $j<$start; $j++){  // 计算前面所需要填充的空格

            $brNum .= ”    “;

        }

        $str .= $brNum.$val[‘name’].PHP_EOL;  // 整个前面的空格和后面的换行

       

        if(count($val[‘children’]) > 0){  // 如果是数组的话，继续分解

            $i = $start+1;  // 分层次等级

            $str .= $this->dealArr($val[‘children’], $i);

        }

    }

    return $str;

}