php - 在 for 循环中将项目添加到多维数组

Question

这是我的数组，我想添加一些元素使其像第二个数组

1.)

array(7) {
  [0] => array(3) {
    ["name"] => string(9) "airG Chat"
    ["product_id"] => int(2469)
    ["price"] => string(4) "0.00"
  }

  [1] => array(3) {
    ["name"] => string(9) "PingChat!"
    ["product_id"] => int(7620)
    ["price"] => string(4) "0.00"
  }
  [2] => array(3) {
    ["name"] => string(25) "MobiEXPLORE Zagreb County"
    ["product_id"] => int(8455)
    ["price"] => string(4) "0.00"
  }
}

添加项目后应该是这样的，我尝试使用每个功能但没有奏效。2.)

array(7) {
  [0] => array(3) {
    ["name"] => string(9) "airG Chat"
    ["product_id"] => int(2469)
    ["price"] => string(4) "0.00"
    ["description"] => string(23) "this is the custom test"
    ["brief_description"] => string(23) "this is the custom test"
  }

  [1] => array(3) {
    ["name"] => string(9) "PingChat!"
    ["product_id"] => int(7620)
    ["price"] => string(4) "0.00"
    ["description"] => string(23) "this is the custom test"
    ["brief_description"] => string(23) "this is the custom test"
  }
  [2] => array(3) {
    ["name"] => string(25) "MobiEXPLORE Zagreb County"
    ["product_id"] => int(8455)
    ["price"] => string(4) "0.00"
    ["description"] => string(23) "this is the custom test"
    ["brief_description"] => string(23) "this is the custom test"
  }
}

Answer 1

foreach与参考 ( ) 一起使用&：

foreach($data as &$datum) {
    $datum["description"] = "this is the custom test";
    $datum["brief_description"] = "this is the custom test";
}

如果您不想使用&（以避免此问题），您可以这样做

foreach($data as $i => $datum) {
    $data[$i]["description"] = "this is the custom test";
    $data[$i]["brief_description"] = "this is the custom test";
}

Answer 2

如果你使用 foreach 并想更改原始数组，则需要添加&.

foreach ($arr as &$item) {
  $item["description"] = "this is the custom test";
  $item["brief_description"] = "this is the custom test";
}