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[英]Matching keys from one array to another and creating a new array with their values?
[英]Removing Array Values From One Array By Comparing Keys Of Another Array
假设我有第一个数组$ aAllCities作为
Array
(
[21] => London
[9] => Paris
[17] => New York
[3] => Tokyo
[25] => Shanghai
[11] => Dubai
[37] => Mumbai
)
另一个数组$ aNotSupportedCities为
Array
(
[0] => 37
[1] => 25
[2] => 11
)
是否有可能得到这样的数组?
Array
(
[21] => London
[9] => Paris
[17] => New York
[3] => Tokyo
)
我想删除其他数组中存在的那些键的数组值
foreach($aAllCities as $key => $value) {
if(in_array($key,$aNotSupportedCities)) {
unset($aAllCities[$key]);
}
}
尝试这个:
$aAllCities = array_flip( $aAllCities );
$aAllCities = array_diff( $aAllCities, $aNotSupportedCities );
$aAllCities = array_flip( $aAllCities );
希望这可以帮助。
其他答案是正确的,但是更流畅,更快捷的方法是:
$supportedCities = array_diff_key($aAllCities, $aNotSupportedCities);
这将从$aAllCities
返回所有在$aAllCities
中没有键的$aNotSupportedCities
注意,这通过它们的键比较两个数组,因此您需要使$aNotSupportedCities
看起来像这样:
Array
(
[37] => something
[25] => doesn't really matter
[11] => It's not reading this
)
祝你好运。
$new = $aAllCities;
foreach($aNotSupportedCities as $id) {
if (isset($new[$id]) {
unset($new[$id]);
}
}
$supportedCities = array_diff_key($aAllCities, array_values($aNotSupportedCities));
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