验证并显示来自多维数组的错误

Question

To get famous sports from counties, I created this form.

$sports = array (
            'Australia' =>  array (
                            1 => 'Cricket',
                            2 => 'Foot Ball',
                            3 => 'Net Ball',
                            4 => 'Kabadi',
                            5 => 'Ragby',
                            6 => 'Basket Ball',
                            7 => 'Volley Ball',
                        ),          
          'New Zealand' =>  array (
                            1 => 'Cricket',
                            2 => 'Foot Ball',
                            3 => 'Net Ball',
                            4 => 'Ragby',
                            5 => 'Basket Ball',                         
                        ),        
              'England' =>  array (
                            1 => 'Cricket',
                            2 => 'Foot Ball',
                            3 => 'Net Ball',
                            4 => 'Ragby',
                            5 => 'Karom',                           
                            6 => 'Basket Ball',                         
                            7 => 'Table Tennis',                            
                            8 => 'Tennis',                          
                        ), 
                );

echo '<br><form action="" method="post">';
    foreach ( $sports AS $country => $sport ) { 
        echo "<h3>{$country}</h3
";    
        foreach ($sport AS $k => $v) { 
            echo "<br /><input type='checkbox'  name='country-sport[{$country}][]' value='{$k}' />{$v}
";
        } 
    }
echo "
<br><input type='submit' value='go' />
</form>";

My problem is When I am going to validate this. Here I need to check some conditions with this form validation.

1. country-subject array is completely empty or not
2. at least 1 or upto 3 sports for each countries have selected or not

these conditions not met need to display error message.

I tried something like this.. with this code I can get 1st error message which is if whole array is empty..

UPDATE : this is my validation code so far..

if ( isset($_POST['country-sport']) && is_array( $_POST['country-sport'])) {

    foreach ( $_POST['country-sport'] AS $country => $sport) { 

        if ( count($sport) >= 1 && count($sport) <= 3) { //checking that it has 3 or more values.
             //process
        } else {
            echo "select at leat 1 or upto 3 sports for {$country} ";          
        }   
    }

} else {    
    echo 'You have not selected sports for any country!';
}

UPDATE : with var_dump($_POST['country-sport']);

array(3) {
  ["Australia"]=>
  array(3) {
    [0]=>
    string(1) "1"
    [1]=>
    string(1) "2"
    [2]=>
    string(1) "3"
  }
  ["New Zealand"]=>
  array(3) {
    [0]=>
    string(1) "2"
    [1]=>
    string(1) "3"
    [2]=>
    string(1) "4"
  }
  ["England"]=>
  array(3) {
    [0]=>
    string(1) "6"
    [1]=>
    string(1) "7"
    [2]=>
    string(1) "8"
  }
}

Answer 1

try this:

if ( isset($_POST['country-sport']) && !empty( $_POST['country-sport'])) {//using empty

    foreach ( $_POST['country-sport'] AS $country => $sport) { 

        if ( count($sport) > 2) { //checking that it has 3 or more values.
             //process
        } else {
            echo "select at leat 1 or upto 3 sports for {$country} ";          
        }   
    }
} else {    
    echo 'You have not selected sports for any country!';
}