简单的HTML dom - 在另一个上面找到一个元素

Question

I'm using PHP Simple DOM Parser (http://simplehtmldom.sourceforge.net/),

So far I've managed to do what I want with it, however I'm attempting to get some text of the first element with a certain class above another.

My issue is that the divs aren't nested in the area I need to get the information from. Like so:

<div class="day">Sunday<div>
<div class="game">...</div>
<div class="game">...</div>
...
<div class="day">Monday<div>
<div class="game">...</div>
<div class="game">...</div>
...

Each game has a title, time, channels.. So whilst I'm gathering all of that in to my array I want to be able to find the first class="day" in order to add it to my array.

$html->find('h2.time_head') is how I'm currently getting the day heads, but I'm not sure how I can match it up to my games, as I'm getting them foreach($html->find('div.blockfix') as $div) like so.

Any help is appreciated.

Answer 1

If above HTML sample is the content of <div class="blockfix">, you can retrieve corresponding day in this way:

foreach( $html->find('div.blockfix') as $block )
{
    foreach( $block->find('div.game') as $div )
    {
        $day = $div;
        while( $day = $day->prev_sibling()  )
        {
            if( $day->class == 'day' ) break;
        }
        if( $day ) echo $day->__toString();
        else       echo 'no day found';
    }
}

I leave your basic foreach because I don't know if you do some other stuffs, but if you prefer you can perform a unique foreach:

foreach( $html->find('div.blockfix div.game') as $div )

The core of code is the use of ->prev_sibling(): we check each previous sibling of current “game” <div> until we found “day” class.