如何限制phpdom解析结果

Question

我正在抓取一些结果，当我抓取时，我得到了 50 个结果。我想只显示前 20 个结果，下面是代码，如何限制结果？

require 'simple_html_dom.php';

    $url = "http://espncricinfo.com/scores/match-100007";
    $html = file_get_html( $url );

    $posts = $html->find('div[type=tuple]');

foreach ( $posts as $post ) {

    $matchtitle = $post->find('span[class=desigd]',0);

    $matchdate = $post->find('span[class=date]',0);

    echo $matchtitle;
    echo $matchdate;
}

Answer 1

使用一个变量来持续计算结果，并在计数到20时立即退出for循环。

<?php
require 'simple_html_dom.php';

    $url = "http://espncricinfo.com/scores/match-100007";
    $html = file_get_html( $url );

    $posts = $html->find('div[type=tuple]');
$count = 0;
foreach ( $posts as $post ) {
$count++
$matchtitle = $post->find('span[class=desigd]',0);

$matchdate = $post->find('span[class=date]',0);

echo $matchtitle;
echo $matchdate;
if($count == 20)
{
    exit();
}
}
?>

如何限制phpdom解析结果

how to limit php dom parsing results

php

parsing

dom

html-parsing