PHP打印嵌套数组foreach

I have the following array which I want to make readable for users:

Array
(
    [3] => Array
        (
            [id] => 3
            [price] => 4.00
            [per] => day
            [count] => 
            [type] => single
            [status] => T
            [extra_quantity] => 1
        )

    [2] => Array
        (
            [id] => 2
            [price] => 12.00
            [per] => day
            [count] => 
            [type] => single
            [status] => T
            [extra_quantity] => 1
        )

)

I want to echo this to show users the following readable line for every subarray:

[id] = [price] per [day]

I am fairly new to arrays, especially nested one like the one I have above, how should I go with this to get an output like I need? Thanks!

FOreach loops are used when iterating over arrays.The above is a multi-dimensional array. Meaning An array in an array

  foreach($array as $value):
    if(array_key_exists($value['id'], $value) && array_key_exists($value['price'], $value) && array_key_exists($value['per'], $value)):
     #we have the keys present.
     echo $value['price'].'per'.$value['per'];
    endif;
    endforeach;

use foreach() built in function which help you get all data as readable

    foreach ($rows as $row) {
            echo $row['price'].'per'.$row['per'];
            echo "<br>";
        }

check for more information

http://php.net/manual/en/control-structures.foreach.php

Must more optimized than two foreach loops,

list($id,$price, $day) = [array_column($your_arr, 'id'),array_column($your_arr, 'price'),array_column($your_arr, 'day')];
foreach($id as $k => $v)
{
    echo $v ." = ".$price[$k]." per ". $day[$k];    
}

array_column Return the values from a single column in the input array.

I hope this will help.