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[英]PHP: check if a value exists in array ( not as equal but as Part of )
[英]Check If Part of an array exists in larger array PHP
我正在嘗試檢測較小的數組是否在較大的數組中。
傳說:
$user = Larger Array
$TMP = Smaller Array
例:
$TMP =
Array
(
[user] => Array
(
[timezone] => -8
)
)
$user =
Array
(
[_id] => MongoId Object
(
[$id] => example
)
[userid] => 275
[user] => Array
(
[email] => thisisatest10@gmail.com
[id] => 48339
[timezone] => Array
(
)
)
)
在這種情況下,我需要一個返回false的腳本。
但是如果時區-8已經在用戶中,我希望它為真
我已經嘗試過了:
$isSubset = 0 == count(array_diff($TMP, $user));
一個遞歸函數,用於檢查較小數組中的每個鍵和葉子值是否存在於較大數組中
function is_subset($smaller,$larger) {
foreach($smaller as $k => $v) {
if(!array_key_exists($k,$larger))
return false;
if(!is_array($v)) {
if($v == $larger[$k])
continue;
else return false;
}
else if(!is_subset($v,$larger[$k]))
return false;
}
return true;
}
$smaller = array('user' => array('timezone' => 2));
$larger = array('one' => 1,'user' => array('timezone' => 1));
var_dump(is_subset($smaller,$larger)); // false
$smaller = array('user' => array('timezone' => 1));
$larger = array('one' => 1,'user' => array('timezone' => 1));
var_dump(is_subset($smaller,$larger)); // true
您可以直接從基本陣列進行比較以提高效率
function checksub($arr,$subarr){
foreach($arr as $key=>$value){
if($value==$subarr)
return true;
else{
if(is_array($value)){
return checksub($value,$subarr);
}
}
}
return false;
}
$array=array("a"=>1,"b"=>2,array("x"=>array("some","data","z"=>"w")));
$sub=array("x"=>array("some","data","z"=>"w"));
$nosub=array("x"=>array("some","data","z"=>"changed"));
$sub2=array("some","data","z"=>"w");
var_dump(checksub($array,$sub));
var_dump(checksub($array,$sub2));
var_dump(checksub($array,$nosub));
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