php - PHP：使用属性数组在数组中查找对象

Question

我正在尝试使用另一个属性数组在数组中查找一个对象（或多个对象）

我遇到了这个问题Find array key in objects array given an attribute value并找到了很好的解决方案，我对其进行了一些修改并最终得到了这个：

//$array = array(object1,object2,object3);
//$attributes example array('first_name'=>'value','last_name'=>'value');
function filter_by_key($array, $attributes) {
   $filtered = array();
   foreach($array as $k => $v) {
      //if($v->$member != $value) //stuck here 
         $filtered[$k] = $v;
   }
   return $filtered;
}

如何修改该行以测试所有给定的 $attributes？

Answer 1

请注意get_object_vars只看到公共属性。可能更有效ReflectionClass::getProperties。

在编辑器中编码，以测试：

//$array = array(object1,object2,object3);
//$attributes example array('first_name'=>'value','last_name'=>'value');
function filter_by_key($array, $attributes) {
   $filtered = array();
   foreach($array as $obj) {
       $found = true;
       $obj_attr = get_object_vars($obj);
       foreach($attributes as $attr => $val){
           if(!isset($obj_attr[$attr]) || $obj_attr[$attr] != $val){
               $found = false;
               break;
           } 
       } 
       if($found){
         $filtered[$k] = $obj;
       }
   }
   return $filtered;
}

Answer 2

array_filter 是过滤数组的专用方法：

function createObject($first, $last) {
   $object = new StdClass;
   $object->first_name = $first;
   $object->last_name = $last;
   return $object;
}

$array = array( createObject('value1', 'value1'), createObject('value', 'value'));
$attributes = array('first_name'=>'value','last_name'=>'value');

var_dump(array_filter($array, function ($element) use($attributes) {
   foreach ($attributes as $attribute => $value) {
        if (is_object($element) 
            && property_exists($element, $attribute) 
            && $element->{$attribute} !== $value
        ) {
            return false;
        }
   }
   return true;
}));

输出：

array(1) {
  [1]=>
  object(stdClass)#4 (2) {
    ["first_name"]=>
    string(5) "value"
    ["last_name"]=>
    string(5) "value"
  }
}

Answer 3

//$array = array(object1,object2,object3);
//$attributes = array('first_name'=>'value','last_name'=>'value');
$filtered = array_filter($array,
        // that's the callback function that filters the object 
        function ($e){
            global $attributes; // we need to make $attributes 
                                // recognizable in the scope
            foreach($attributes as $k => $v){
                if($e[$k] == $v){ // only if object $e from the array has 
                                  // the same attribute and same value
                    return true;  // add this object to $filtered
                }
            }
            return false;
        }
);

Answer 4

我希望它会帮助你

数组（[945] => 成员对象（[id] => 13317 [name] => 测试 999 [last_name] => 测试 999）[54] => 成员对象（[id] => 13316 [name] => Manuel [last_name] => Maria parra ) [654] => member Object ( [id] => 13315 [name] => Byron [last_name] => Castillo ) [656] => member Object ( [id] => 13314 [姓名] => 塞萨尔 [姓氏] => 瓦斯奎兹 ) )

function filter_by_key($array, $member, $attributes) {
$filtered = array();
foreach ($array as $k => $v) {
    if (in_array($v->$member, $attributes)) {
        $filtered[$k] = $v;
    }
}
return $filtered;

}

$filterd = filter_by_key($array, 'id', array('13316','13317'));