php中array_keys多条件筛选键名_php结合array_filter提取符合条件的键列表

$fruits = [
    'apple'  => 'red',
    'banana' => 'yellow',
    'grape'  => 'purple',
    'lemon'  => 'yellow'
];

// 获取值为 'yellow' 的键名
$yellow_keys = array_keys($fruits, 'yellow');
// 结果: ['banana', 'lemon']

$users = [
    'admin_id'    => 100,
    'user_name'   => 'john',
    'user_age'    => 25,
    'temp_data'   => 'tmp',
    'config_path' => '/var/www'
];

// 筛选键名包含 '_user' 或以 'temp_' 开头的键
$filtered_keys = array_filter(
    array_keys($users),
    function ($key) {
        return strpos($key, '_user') !== false || 
               strpos($key, 'temp_') === 0;
    }
);

// 结果: ['user_name', 'user_age', 'temp_data']

function filter_keys_by_conditions($array, $conditions, $use_and = false) {
    $keys = array_keys($array);
    
    return array_values(array_filter($keys, function ($key) use ($conditions, $use_and) {
        $results = array_map(fn($cond) => $cond($key), $conditions);
        
        return $use_and ? !in_array(false, $results) : in_array(true, $results);
    }));
}

// 定义筛选条件
$conditions = [
    fn($k) => strpos($k, 'user') !== false,
    fn($k) => strlen($k) > 8
];

// 满足任一条件
$result = filter_keys_by_conditions($users, $conditions); 
// 输出: ['user_name', 'user_age', 'config_path']

// 满足所有条件
$result = filter_keys_by_conditions($users, $conditions, true);
// 输出: ['user_name', 'user_age']