使用 PHP 按另一个数组中的值过滤数组答案

【问题标题】：Filter array by values in another array with PHP使用 PHP 按另一个数组中的值过滤数组
【发布时间】：2017-01-24 11:57:44
【问题描述】：

我有一个这样的数组：

[
  {
    "Firepack_sn":"20012205",
    "Installation_Date":"",
    "Type":"EH","Standard":"VAS",
    "Capacity_m3h":"81",
    "Pressure_bar":"3,4",
    "Rpm":"2930",
    "Power_kw":"72"
  },
  {
    "Firepack_sn":"20023901",
    "Installation_Date":"",
    "Type":"DH","Standard":"VAS",
    "Capacity_m3h":"195",
    "Pressure_bar":"4,2",
    "Rpm":"2000",
    "Power_kw":"72"
  }
]

还有一个这样的数组2：

[
  {
    "user_id":"40009",
    "firepack_id":"20012205",
    "activated":"1"
  },
  {
    "user_id":"40009",
    "firepack_id":"21020393",
    "activated":"0"
  }
]

现在我想过滤第一个数组，所以我只获取array2中存在的Firepack_sn元素作为firepack_id

所以我希望输出是这样的：

[
  {
    "Firepack_sn":"20012205",
    "Installation_Date":"",
    "Type":"EH","Standard":"VAS",
    "Capacity_m3h":"81",
    "Pressure_bar":"3,4",
    "Rpm":"2930",
    "Power_kw":"72"
  }
]

我怎样才能做到这一点？

【问题讨论】：

标签： php arrays filter filtering array-filter

【解决方案1】：

这是一种方法：

首先，您需要提取您需要查找的firepack_id，然后您需要循环通过$arr1并检查Firepack_sn是否与您之前提取的firepack_id相同，如果是，则将其添加到一个数组。

$arr1 = json_decode('[{"Firepack_sn":"20012205","Installation_Date":"","Type":"EH","Standard":"VAS","Capacity_m3h":"81","Pressure_bar":"3,4","Rpm":"2930","Power_kw":"72","Pump_Type":"KSB KFP50-200","Motor_Type":"DOOSAN PU066 VAS/CEA","Controller_Type":"WB882-E10 VAS","Pump_sn":"085259","Motor_sn":"EARPA209635","Controller_sn":"","Servicelevel":"","Cust_id":"0","Cust_branche":"","Cust_name":"","Cust_address1":"","Cust_zipcode":"","Cust_city":"","Cust_country":"","Cust_Phone":"","Cust_coachlevel":"","Site_Name":"E-set","Site_address1":"","Site_address2":"","Site_address3":"","Site_zipcode":"","Site_city":"","Site_country":"","Site_contact":"","Site_phone":"","activated":"1"},{"Firepack_sn":"20023901","Installation_Date":"","Type":"DH","Standard":"VAS","Capacity_m3h":"195","Pressure_bar":"4,2","Rpm":"2000","Power_kw":"72","Pump_Type":"KSB KFP50-200","Motor_Type":"DOOSAN PU066 VAS/CEA","Controller_Type":"WB882-E10 VAS","Pump_sn":"085259","Motor_sn":"EARPA209635","Controller_sn":"","Servicelevel":"","Cust_id":"0","Cust_branche":"","Cust_name":"","Cust_address1":"","Cust_zipcode":"","Cust_city":"","Cust_country":"","Cust_Phone":"","Cust_coachlevel":"","Site_Name":"D-set","Site_address1":"","Site_address2":"","Site_address3":"","Site_zipcode":"","Site_city":"","Site_country":"","Site_contact":"","Site_phone":"","activated":"0"}]');

$arr2 = json_decode('[{"user_id":"40009","firepack_id":"20012205","activated":"1"},{"user_id":"40009","firepack_id":"21020393","activated":"0"}]');

$firepackIds = array();
foreach($arr2 as $item){
  $firepackIds[] = $item->firepack_id;
}

$goodRows = array();
foreach($arr1 as $item){
  if(in_array($item->Firepack_sn, $firepackIds)){
    $goodRows[] = $item;
  }
}

echo json_encode($goodRows);

希望这会有所帮助。

【讨论】：

谢谢！你的答案没有用，但做了一些小的编辑它就奏效了。编辑：$item->firepack_id； = $item['firepack_id'] $item->Firepack_sn = $item['Firepack_sn']
@DNC 什么不起作用。我在理解您的编辑时遇到了一些困难，我怀疑其中的某些部分已被删除，您能否在某个地方发布一个要点以便我可以更新我发布的内容？