Question

有没有办法回应（使用PHP）属于特定类的所有段落（HTML页面）？我尝试过这样的东西，但它不起作用（它没有回应任何东西）

$dom = new DOMDocument;
$dom->loadHTML($html); //the code I need is contained in the $html variable
foreach($dom->getElementsByTagName('p') as $paragraph) {
        if ( $paragraph->getAttribute('class') === 'items') {
            echo $paragraph->nodeValue."<br>";
        }
}

Answer 1

备份Ghost提到的内容，如果你有多个课程，最好使用strpos。以此为例。

<?php

$html = "<p class='items two small-font'>This is paragraph 1</p> <br> <hr> <p class='items'>This is paragraph 2</p> <br> <hr> <p class='noitem'>This is paragraph 3</p> <br> <hr>";

$dom = new DOMDocument;
$dom->loadHTML($html);

foreach($dom->getElementsByTagName('p') as $paragraph) {

    $class = $paragraph->getAttribute('class');

    if ( strpos( $class , 'items') !== false ) {
        echo $paragraph->nodeValue."<br>";
    }

} 

?>

回应特定类的所有段落

1 个答案: