PHP如何合并2个查询

Question

I have these 2 queries:

1) Get all the URL of the images:

$imgs = $xpath->query('//div[@class="pin"]/div[@class="PinHolder"]/a/img');

2) Get how many people facebook-liked every image:

foreach($xpath->query('//span[@class="LikesCount"]') as $span) {
    $int = (int) $span->nodeValue;
    if ($int > 5) {
        echo $i++ . "--> " . $int . "<br />";
    }
}

I'd like to merge them to get just the images which has been facebook-liked more than 5 times That said, pictures that hasn't been liked don't have the LikesCount class at all.

Follow an example of the Markup:

<div class="pin">

[...]

<a href="/pin/56787645270909880/" class="PinImage ImgLink">
    <img src="http://media-cache-ec3.pinterest.com/upload/56787645270909880_d7AaHYHA_b.jpg" 
         alt="Krizia" 
         data-componenttype="MODAL_PIN" 
         class="PinImageImg" 
         style="height: 288px;">
</a>

<p class="stats colorless">
    <span class="LikesCount"> 
        22 likes 
    </span>
    <span class="RepinsCount">
        6 repins
    </span>
</p>

[...]

</div>

Answer 1

To retrieve not all images, but only images with a likes-count of 5 or more, I'd try changing the XPath expression in the assignment to $imgs to read:

//div[@class="pin"]
     [.//span[@class = 'LikesCount']
             [substring-before(normalize-space(.),' ') > 5]]
     /div[@class="PinHolder"]
     /a/img

(I have added whitespace to make this a little easier to follow; you may need to eliminate the newlines if your XPath parser doesn't follow the spec in this matter [some don't]).

It's not clear to me why cbuckley says this will require XPath 2.0; perhaps he sees some subtle issue here that I don't.