如何使用等于PHP中某个单词的键删除数组元素？

Question

我有这个巨大的阵列:

array(47) (
    "name" => string(0) ""
    "state" => string(7) "Alabama"
    "city" => string(0) ""
    "country" => string(13) "United States"
    "location" => string(0) ""
    "rooms" => string(0) ""
    "price" => string(0) ""
    "highlights" => array(5) (
        0 => string(0) ""
        1 => string(0) ""
        2 => string(0) ""
        3 => string(0) ""
        4 => string(0) ""
    )
    "specifications_type" => string(0) ""
    "specifications_lotsize" => string(0) ""
    "specifications_apn" => string(0) ""
    "specifications_interest" => string(0) ""
    "specifications_year" => string(0) ""
    "specifications_buildings" => string(0) ""
    "specifications_stories" => string(0) ""
    "specifications_corridors" => string(0) ""
    "financials_room" => string(0) ""
    "financials_other" => string(0) ""
    "financials_total" => string(0) ""
    "financials_multiplier" => string(0) ""
    "financials_caprate" => string(0) ""
    "financials_netincome" => string(0) ""
    "amenities_pool" => string(0) ""
    "amenities_fitness" => string(0) ""
    "amenities_quarters" => string(0) ""
    "amenities_services" => string(0) ""
    "amenities_spa" => string(0) ""
    "amenities_meetspace" => string(0) ""
    "amenities_parkspace" => string(0) ""
    "amenities_others" => string(0) ""
    "facilities_room" => string(0) ""
    "facilities_hvac" => string(0) ""
    "facilities_furnitures" => string(0) ""
    "facilities_tv" => string(0) ""
    "facilities_ref" => string(0) ""
    "facilities_microwave" => string(0) ""
    "consumables_resto" => string(0) ""
    "consumables_restocpct" => string(0) ""
    "consumables_barlounge" => string(0) ""
    "consumables_barloungecpct" => string(0) ""
    "consumables_bevrevenue" => string(0) ""
    "consumables_others" => string(0) ""
    "specifications" => string(100) "{"type":"","lotsize":"","apn":"","interest":"","year":"","buildings":"","stories":"","corridors":""}"
    "consumables" => string(89) "{"resto":"","restocpct":"","barlounge":"","barloungecpct":"","bevrevenue":"","others":""}"
    "amenities" => string(100) "{"type":"","lotsize":"","apn":"","interest":"","year":"","buildings":"","stories":"","corridors":""}"
    "facilities" => string(100) "{"type":"","lotsize":"","apn":"","interest":"","year":"","buildings":"","stories":"","corridors":""}"
    "financials" => string(100) "{"type":"","lotsize":"","apn":"","interest":"","year":"","buildings":"","stories":"","corridors":""}"
)

我想删除其键以以下任何一项开头的元素:"specifications_","amenities_","facilities_","consumables_","financials_"

我曾想过将array_filter与回调一起使用,但我不知道如何在回调中做事.请帮忙.

Answer 1

你不能真正使用array_filter()它,因为它保留了键,但你不能过滤键,这是你的问题.在这种情况下,你也可以循环.

$prefix = array(
  'specifications_',
  'amenities_',
  'facilities_',
  'consumables_',
  'financials_',
);

$output = array();
foreach ($input as $k => $v) {
  foreach ($prefix as $p) {
    $add = true;
    if (strpos($k, $p) === 0) {
      $add = false;
      break;
    }
  }
  if ($add) {
    $output[$k] = $v;
  }
}

现在这个工作得相当好,只要前缀列表不是那么大而且数组不是那么大但是除非你需要它,否则不需要过度复杂化解决方案.