php 如何过滤对象数组？
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How to filter an array of object?
提问by Alex
I've got an array of objects (show below) and I would like to write a function that returns the same array but with the "object(s)" that meet the criterion removed.
我有一个对象数组（如下所示），我想编写一个函数，该函数返回相同的数组，但删除了满足条件的“对象”。
The function would :
该功能将：
1- check if the index exists 2- if it exists, checks for the required value and if the object's index is equal to that value, remove the whole object.
1- 检查索引是否存在 2- 如果存在，检查所需的值，如果对象的索引等于该值，则删除整个对象。
For example :
例如 ：
Array
(
[course] => Array
(
[0] => stdClass Object
(
[name] => Programmation Web
[description] =>
[public] => 0
[requests] => 0
[id] => 245
[members] => Array
(
[0] => stdClass Object
(
[id] => 11
[name] => Robert Smith
)
)
[projects] => Array
(
[0] => stdClass Object
(
[id] => 1923
[title] => Sans titre (1)
[type] => portfolio
)
)
[project_count] => 1
[admins] => Array
(
[0] => stdClass Object
(
[member] => 11
[firstname] => Robert
[lastname] => Smith
)
)
[topic_name] => Le PHP
[activites] => Array
(
[0] => stdClass Object
(
[topic_name] =>
[topic_id] => 42
[post_parent] => 107
[post_body] => Oui moi aussi je me demande ?a.
[post_id] => 109
)
)
[forums] => Array
(
[0] => stdClass Object
(
[forum_name] => Discussion générale
[forum_id] => 101
)
)
)
[1] => stdClass Object
(
[name] => Les bases de données
[description] =>
[public] => 0
[jointype] => controlled
[grouptype] => course
[membershiptype] => admin
[topic_name] => Difficulté
[activites] => Array
(
[0] => stdClass Object
(
[topic_name] =>
[topic_id] => 44
[post_parent] => 111
[post_body] => Ouah!
[post_id] => 112
)
)
[forums] => Array
(
[0] => stdClass Object
(
[forum_name] => Le MySQL
[forum_id] => 103
)
)
)
)
)
If there's an object whose admins->membervalue is equal to 11, remove the object and return the array without this object. The returned array would thus be :
如果有一个对象的admins->member值等于 11，则删除该对象并返回没有此对象的数组。因此返回的数组将是：
Array
(
[course] => Array
(
[0] => stdClass Object
(
[name] => Programmation Web
[description] =>
[public] => 0
[requests] => 0
[id] => 245
[members] => Array
(
[0] => stdClass Object
(
[id] => 11
[name] => Robert Smith (smithrobert)
)
)
[projects] => Array
(
[0] => stdClass Object
(
[id] => 1923
[title] => Sans titre (1)
[type] => portfolio
)
)
[project_count] => 1
[admins] => Array
(
[0] => stdClass Object
(
[member] => 11
[firstname] => Robert
[lastname] => Smith
)
)
[topic_name] => Le PHP
[activites] => Array
(
[0] => stdClass Object
(
[topic_name] =>
[topic_id] => 42
[post_parent] => 107
[post_body] => Oui moi aussi je me demande ?a.
[post_id] => 109
)
)
[forums] => Array
(
[0] => stdClass Object
(
[forum_name] => Discussion générale
[forum_id] => 101
)
)
)
)
)
How would I go about doing that?
我该怎么做？
回答by netcoder
Want to filter an array? Use array_filter!
想要过滤数组？使用array_filter！
$new_array = array_filter($array, function($obj){
if (isset($obj->admins)) {
foreach ($obj->admins as $admin) {
if ($admin->member == 11) return false;
}
}
return true;
});
回答by Clive
You can use array_filterwith a custom callback:
您可以使用array_filter自定义回调：
function filter_callback($element) {
if (isset($element->foo) && $element->foo == 'some_value') {
return TRUE;
}
return FALSE;
}
$arr = array_filter($arr, 'filter_callback');
回答by aDhaouadi
Provide another approach with using case : function used array_key_exists& in_array
提供另一种使用 case 的方法：函数使用array_key_exists& in_array
$params = [
"nom" => 'titof',
"prenom" => 'edoe',
"age" => '25'
];
$data = [
0 => [
'nom' => 'john',
'prenom' => 'doe',
'age' => '25'
],
1 => [
'nom' => 'lola',
'prenom' => 'la grandi',
'age' => '72'
],
2 => [
'nom' => 'michael',
'prenom' => 'Pamal',
'age' => '25'
]
];
function getFilteredArray($params, $data) {
$filtredArray = [];
foreach($params as $key => $value) {
foreach($data as $index => $item) {
if(array_key_exists($key, $item) && in_array($value, $params)) {
if($item[$key] == $value ){
$filtredArray[$index] = $item;
} else {
continue;
}
}
}
}
return $filtredArray;
}
You can found it here : https://gist.github.com/ADCPD/a00df3f44b96322fbd6818f216e9d982
你可以在这里找到它：https: //gist.github.com/ADCPD/a00df3f44b96322fbd6818f216e9d982
回答by W. Dan
Provide another method:
提供另一种方法：
public function getArrayFiltered($aFilterKey, $aFilterValue, $array) {
$filtered_array = array();
foreach ($array as $value) {
if (isset($value->$aFilterKey)) {
if ($value->$aFilterKey == $aFilterValue) {
$filtered_array[] = $value;
}
}
}
return $filtered_array;
}
