PHP中遍历关联数组的方法

php $sports = array( 'football' => 'good',  
    'swimming' => 'very well',  
    'running'  => 'not good' ); foreach ($sports as $key => $value) { echo $key.": ".$value."
";  
} ?>  

php $sports = array( 'football' => 'good',
    'swimming' => 'very well',
    'running'  => 'not good' ); while ($elem = each($sports)) { echo $elem['key'].": ".$elem['value']."
";
} ?>

php $sports = array( 'football' => 'good',
    'swimming' => 'very well',
    'running'  => 'not good' ); while (list($key, $value) = each($sports)) { echo $key.": ".$value."
";
} ?>