如何在php中从多维关联数组中检索特定值？

function searchValue($array, $value) {
    foreach ($array as $key => $val) {
        if ($val === $value) {
            return $key;
        } elseif (is_array($val)) {
            $result = searchValue($val, $value);
            if ($result !== false) {
                return $key . '.' . $result;
            }
        }
    }
    return false;
}

$array = array(
    'a' => array(
        'b' => 'value1',
        'c' => 'value2'
    ),
    'd' => 'value3'
);

$result = searchValue($array, 'value2');
echo $result; // 输出：a.c

function searchValue($array, $value) {
    foreach ($array as $key => $val) {
        if ($val === $value) {
            return $key;
        } elseif (is_array($val)) {
            $result = searchValue($val, $value);
            if ($result !== false) {
                return $key . '.' . $result;
            }
        }
    }
    return false;
}

$array = array(
    'a' => array(
        'b' => 'value1',
        'c' => 'value2'
    ),
    'd' => 'value3'
);

$result = searchValue($array, 'value2');
echo $result; // 输出：a.c

function searchValue($value, $key, $search) {
    if ($value === $search) {
        echo $key . ' ';
    }
}

$array = array(
    'a' => array(
        'b' => 'value1',
        'c' => 'value2'
    ),
    'd' => 'value3'
);

array_walk_recursive($array, 'searchValue', 'value2');
// 输出：a.c