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@ 2018-08-14T22:56:32Z

<?php

$data = [
  [
    "item" => 'apple',
    "quality" => 3,
    "store" => 'freds',
    "price" => 2
  ],
  [
    "item" => 'pear',
    "quality" => 1,
    "store" => 'bobs',
    "price" => 3
  ],
  [
    "item" => 'banana',
    "quality" => 2,
    "store" => 'freds',
    "price" => 1
  ],
  [
    "item" => 'kiwi',
    "quality" => 2,
    "store" => 'sams',
    "price" => 4
  ],
  [
    "item" => 'coconut',
    "quality" => 2,
    "store" => 'sams',
    "price" => 6,
  ],
  [
    "item" => 'lime',
    "quality" => 3,
    "store" => 'sams',
    "price" => 5
  ]
];

usort($data, function ($a,$b){
    if($a['quality']==$b['quality']){
         if($a['store']==$b['store']){
              if($a['price']==$b['price']){
                  return 0;
              }else{
                  return $a['price']>$b['price']?-1:1;//Descending
              }
         }else{
                  return $a['store']<$b['store']?-1:1;//Ascending
         }
    }else{
                  return $a['quality']<$b['quality']?-1:1;//Ascending
    }
});

var_dump($data);

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14: array(6) { [0]=> array(4) { ["item"]=> string(4) "pear" ["quality"]=> int(1) ["store"]=> string(4) "bobs" ["price"]=> int(3) } [1]=> array(4) { ["item"]=> string(6) "banana" ["quality"]=> int(2) ["store"]=> string(5) "freds" ["price"]=> int(1) } [2]=> array(4) { ["item"]=> string(7) "coconut" ["quality"]=> int(2) ["store"]=> string(4) "sams" ["price"]=> int(6) } [3]=> array(4) { ["item"]=> string(4) "kiwi" ["quality"]=> int(2) ["store"]=> string(4) "sams" ["price"]=> int(4) } [4]=> array(4) { ["item"]=> string(5) "apple" ["quality"]=> int(3) ["store"]=> string(5) "freds" ["price"]=> int(2) } [5]=> array(4) { ["item"]=> string(4) "lime" ["quality"]=> int(3) ["store"]=> string(4) "sams" ["price"]=> int(5) } }

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