如何在这种类型的多维数组上使用foreach循环进行分析？

Question

I am trying to get the values from this multidimentional array.its pattern is as follows by using print_r($link_array);

The array is actually from the google rss api.

 Array ( [0] => Array ( [title] => World Cup draw -- group-by-group analysis [link] =>          http://www.dawn.com/news/1061096/world-cup-draw-group-by-group-analysis [author] => [publishedDate] => Sat, 07 Dec 2013 02:31:51 -0800 [contentSnippet] => GROUP A: Brazil, Croatia, Mexico, Cameroon - Having hit form in spectacular style earlier this year by winning the ... [content] =>asdfasdf
[categories] => Array ( [0] => Sport/Football ) ) [1] => Array ( [mediaGroups] => Array ( [0] => Array ( [contents] => Array ( [0] => Array ( [url] => http://i.dawn.com/primary/2013/12/52a2f7a584e2a.jpg [type] => image/jpeg [medium] => image [title] => Brazil's head coach Luiz Felipe Scolari. -Photo by AP [thumbnails] => Array ( [0] => Array ( [url] => http://i.dawn.com/primary/2013/12/52a2f7a584e2a.jpg ) ) ) ) ) )

I have tried following three ways

echo $link_array[0];
   echo $link_array[title];

          foreach($link_array as $key=>$value){

           echo $key;

    }

Pleas help.

Answer 1

Your guess is mostly right, however you're printing its keys, just try acessing value['title'] and you'll get the title:

foreach($link_array as $key=>$value){
       echo $value['title'];
}

Answer 2

You need to first assign the array to a variable.

$link_array = Array ( [0] => Array ( [title] => World Cup draw -- group-by-group analysis [link] =>          http://www.dawn.com/news/1061096/world-cup-draw-group-by-group-analysis [author] => [publishedDate] => Sat, 07 Dec 2013 02:31:51 -0800 [contentSnippet] => GROUP A: Brazil, Croatia, Mexico, Cameroon - Having hit form in spectacular style earlier this year by winning the ... [content] =>asdfasdf
[categories] => Array ( [0] => Sport/Football ) ) [1] => Array ( [mediaGroups] => Array ( [0] => Array ( [contents] => Array ( [0] => Array ( [url] => http://i.dawn.com/primary/2013/12/52a2f7a584e2a.jpg [type] => image/jpeg [medium] => image [title] => Brazil's head coach Luiz Felipe Scolari. -Photo by AP [thumbnails] => Array ( [0] => Array ( [url] => http://i.dawn.com/primary/2013/12/52a2f7a584e2a.jpg ) ) ) ) ) )

then you can do excatly as you have done

foreach ($link_array as $key=>$value):
    echo $key . " - " . $value;
endforeach;

but this will not display your internal arrays within the array. For that you would need to do a for each inside a foreach if is_array($link_array[$key]))

foreach ($link_array as $key=>$value):
    $new = $link_array[$key];
    if (is_array($new)):
        foreach ($new as $key1=>$value1):
            echo $key1 . " - " . $value1;
        endforeach;
    else: 
        echo $key . " - " . $value;
    endif;
endforeach;

You can go as many levels deep as you want and change the echo.

Answer 3

You could also call a function within a function:

// call it
loopfor($link_array);
function loopfor ($DATA) {
    foreach ($DATA as $key=>$value):
        if (is_array($DATA[$key])):
            loopfor($DATA[$key]);
        else:
            echo $key . " - " . $value;
        endif;
    endforeach;
}