dongxi1680 2015-06-23 12:35
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在PHP中将当前页面上的H1元素废弃

I'm currently working with Wordpress. I have a hook that runs before a <title> attribute is populated with text that a user enters in the dashboard.

Now I want to set a default title of each page to equal an <h1> attribute text value on a current page. A fragment of the callback function for the hook I'm working with would look like:

if (!$seoTitle) {
    $seoTitle = '<....>';
}

return $seoTitle;

I want seoTitle to default to an <h1> element text on the current page. Is it doable? How can I achieve this?

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  • dongzhuo5425 2015-06-23 14:20
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    I'm not totally sure how you get your HTML but you could parse it with the built in DOM parser.

    <?php

$html = "<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>

<h1>This is a Heading one</h1>
<p>This is a paragraph.</p>
<h1>This is a Heading two</h1>
<p>This is a paragraph.</p>
<h1>This is a Heading three</h1>
<p><a href='testwww'> This is a paragraph.</a></p>


</body>
</html>";

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

//If you want to get it from a website you could do the following:
//$dom->loadHTML(file_get_contents('http://www.w3schools.com/'));

// iterate through the html to get all h1 text
foreach($dom->getElementsByTagName('h1') as $heading) {
    $h1 = $heading->nodeValue;
    echo $h1 . "<br>";
}

?>
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