将foreach中的数组值与另一个数组中的键/值关联

$values = ['apple', 'banana', 'cherry'];
$assocArray = [
    'fruit1' => 'apple',
    'fruit2' => 'banana',
    'fruit3' => 'cherry'
];

$newAssoc = [];
foreach ($values as $value) {
    foreach ($assocArray as $key => $val) {
        if ($value == $val) {
            $newAssoc[$value] = $key;
            break; // 找到匹配项后退出内层循环
        }
    }
}

print_r($newAssoc);

Array
(
    [apple] => fruit1
    [banana] => fruit2
    [cherry] => fruit3
)

$newAssoc = [];
foreach ($values as $value) {
    if (isset($assocArray[$value])) {
        $newAssoc[$value] = $assocArray[$value];
    } else {
        // 处理找不到对应键的情况
        $newAssoc[$value] = null; // 或者其他默认值
    }
}

print_r($newAssoc);