如何在PHP中打印数组数组的所有第一个值？

Question

I am using the 'PHP Simple HTML DOM Parser' library. My code basically loops through my different sites and lists all the relevant anchors I need, my question is: how do I print the 1st value of the href in the anchor of the "selector" in each of the $memb(n) variables in the array of $team.

This is my code:

$memb1 = 'http://www.xyz1.org';
$memb2 = 'http://www.abc3.org';
$memb(n) = '...etc...etc'

$teams = array(
    array("url" => $memb1, "selector" => ".product-list >
                      table:nth-child(1) >
                      tbody:nth-child(1) >
                      tr:nth-child(2) >
                      td:nth-child(2) > a"),
    array("url" => $memb2, "selector" => ".product-list >
                      table:nth-child(1) >
                      tbody:nth-child(1) >
                      tr:nth-child(2) >
                      td:nth-child(2) > a"),
    array("url" => $memb(n), "selector" => ".product-list >
                      table:nth-child(1) >
                      tbody:nth-child(1) >
                      tr:nth-child(2) >
                      td:nth-child(2) > a"),...etc...etc

When running the foreach loop like this:

foreach($teams as $site) {
    $url = $site["url"];
    $html = file_get_html($url);
    foreach ($html->find($site["selector"]) as $a) {
        $links[] = $a->href;
    }
}
?>
<pre>
<?php print_r($links);?>
</pre>

I get all the selected anchors I wanted from all the $memb variables all together, yet i'm trying to print the 1st value of the href in the anchor of the "selector" in each of the $memb(n) variables in the array of $team, yet I can't find a way to do this.

I already tried print_r(array_values($links)[0]); yet I get only the 1st anchor from $memb1 and it stops there, it doesn't continue to print the first anchor of $memb2 and so on.

How can I print the 1st anchor (index 0) from every different $memb site?

Answer 1

If I get you right, than try this:

foreach($teams as $site) {
    $url = $site["url"];
    $html = file_get_html($url);
    foreach ($html->find($site["selector"]) as $a) {
        $links[] = $a->href;
        break;
    }
}

or, you can do it a little bit optimized:

foreach($teams as $site) {
    $url = $site["url"];
    $html = file_get_html($url);
    $link = $html->find($site["selector"], 0);
    if (!empty($link)) $links[] = $link->href;
}