麻烦解答一下

[jellday]

$xml = simplexml_load_file('http://feeds.bbc.co.uk/weather/feeds/rss/5day/id/2315.xml');
$f=array();
foreach( $xml->channel->item as $item )
{
    $arr = (array)$item;
    $params = array();
    //title
    if(preg_match( '/^[^:]+:([^,]+)/is',$arr['title'],$tmp ) )
        $params['Title'] = $tmp[1];
    
    //description
    $strs = explode( ',',$arr['description'] );
    foreach( $strs as $v )
    {
        $tmp = explode( ': ',$v );
        //$params[trim($tmp[0])]=$tmp[1];
		$k = trim($tmp[0]); $params[$k] = ( $k=='Max Temp' || $k=='Min Temp' )?(int) $tmp[1]:$tmp[1]; 
    }
    //pubdate
    $params['pubDate'] = $arr['pubDate'];

   // echo '<pre>';    print_r( $params );    echo '</pre>';
	  $f[$key]=$params;
	  $key++;	    
}
echo '<pre>';    print_r($f);    echo '</pre>';
echo $f[1]["Humidity"];
echo $f[2]["Humidity"];
echo $f[0]["Min Temp"];

$f数组结构:

Array
(
    [] => Array
        (
            [Title] =>  sunny intervals
            [Max Temp] => 17
            [Min Temp] => 11
            [Wind Direction] => E
            [Wind Speed] => 8mph
            [Visibility] => moderate
            [Pressure] => 1031mb
            [Humidity] => 68%
            [UV risk] => low
            [Sunrise] => 07:06BST
            [Sunset] => 19:14BST
            [pubDate] => Wed, 24 Sep 2008 05:40:22 +0000
        )

    [1] => Array
        (
            [Title] =>  sunny intervals
            [Max Temp] => 16
            [Min Temp] => 8
            [Wind Direction] => SE
            [Wind Speed] => 5mph
            [Visibility] => moderate
            [Pressure] => 1035mb
            [Humidity] => 80%
            [UV risk] => low
            [Sunrise] => 07:08BST
            [Sunset] => 19:11BST
            [pubDate] => Wed, 24 Sep 2008 05:40:22 +0000
        )

    [2] => Array
        (
            [Title] =>  sunny intervals
            [Max Temp] => 16
            [Min Temp] => 7
            [Wind Direction] => S
            [Wind Speed] => 10mph
            [Visibility] => very poor
            [Pressure] => 1034mb
            [Humidity] => 79%
            [UV risk] => low
            [Sunrise] => 07:10BST
            [Sunset] => 19:09BST
            [pubDate] => Wed, 24 Sep 2008 05:40:22 +0000
        )

)

第一，本人是新手，上面的代码是另一位热心人提供的。因为想要存入3个数组，不知道“$f[$key]=$params; $key++;”这段代码是否正确。
第二，请问如何调用$f[]这个数组的变量? $f[]["Title"]是不行的。

[程序猿之殇]

[Quote=引用楼主 jellday 的帖子:]
第二，请问如何调用$f[]这个数组的变量? $f[]["Title"]是不行的。
[/Quote]
访问变量要指明索引的.
可以这样访问$f[0]['Title'],$f[1]['Title']

至于第一个问题,不太明白楼主的意思

[foolbirdflyfirst]

$xml = simplexml_load_file('http://feeds.bbc.co.uk/weather/feeds/rss/5day/id/2315.xml');
$f=array();
//================
$key = 0;//初始化变量
//================
foreach( $xml->channel->item as $item )
{
    $arr = (array)$item;
    $params = array();
    //title
    if(preg_match( '/^[^:]+:([^,]+)/is',$arr['title'],$tmp ) )
        $params['Title'] = $tmp[1];
    
    //description
    $strs = explode( ',',$arr['description'] );
    foreach( $strs as $v )
    {
        $tmp = explode( ': ',$v );
        //$params[trim($tmp[0])]=$tmp[1];
        $k = trim($tmp[0]); $params[$k] = ( $k=='Max Temp' || $k=='Min Temp' )?(int) $tmp[1]:$tmp[1]; 
    }
    //pubdate
    $params['pubDate'] = $arr['pubDate'];

   // echo '<pre>';    print_r( $params );    echo '</pre>';
      $f[$key]=$params;
      $key++;        
}
echo '<pre>';    print_r($f);    echo '</pre>';
echo $f[1]["Humidity"];
echo $f[2]["Humidity"];
echo $f[0]["Min Temp"];