PHP code example of wp-php-toolkit / html

1. Go to this page and download the library: Download wp-php-toolkit/html library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

wp-php-toolkit / html example snippets



l = <<<'HTML'
<article>
	<img src="hero.jpg" alt="Hero">
	<p>Intro copy.</p>
	<img src="inline.jpg" alt="Inline">
</article>
HTML;

$tags = new WP_HTML_Tag_Processor( $html );
while ( $tags->next_tag( 'img' ) ) {
	// Don't clobber an explicit eager hint the author already set.
	if ( null === $tags->get_attribute( 'loading' ) ) {
		$tags->set_attribute( 'loading', 'lazy' );
	}
	$tags->set_attribute( 'decoding', 'async' );
}

echo $tags->get_updated_html();



l = <<<'HTML'
<p>See <a href="/about">about</a>, <a href="https://example.com/x">x</a>, 
and <a href="contact.html">contact</a>.</p>
HTML;

$base = 'https://my-site.test/';

$tags = new WP_HTML_Tag_Processor( $html );
while ( $tags->next_tag( 'a' ) ) {
	$href = $tags->get_attribute( 'href' );
	if ( null === $href || '' === $href ) {
		continue;
	}
	if ( preg_match( '#^[a-z][a-z0-9+.-]*:#i', $href ) || 0 === strpos( $href, '//' ) || 0 === strpos( $href, '#' ) ) {
		continue;
	}
	$tags->set_attribute( 'href', rtrim( $base, '/' ) . '/' . ltrim( $href, '/' ) );
}

echo $tags->get_updated_html();



rusted = <<<'HTML'
<p onclick="x()">hi</p>
<script>evil()</script>
<img src="x" onerror="boom()">
HTML;

$tags = new WP_HTML_Tag_Processor( $untrusted );
while ( $tags->next_tag() ) {
	// next_tag() never lands on closing tags, so no is_tag_closer() guard
	// is needed here.
	if ( 'SCRIPT' === $tags->get_tag() ) {
		$tags->set_modifiable_text( '' );
	}
	foreach ( $tags->get_attribute_names_with_prefix( 'on' ) as $attr ) {
		$tags->remove_attribute( $attr );
	}
}

echo $tags->get_updated_html();



ce = bin2hex( random_bytes( 8 ) );

$html = <<<'HTML'
<head><style>body{font:16px sans-serif}</style></head>
<body><script>console.log("hi")</script><script src="vendor.js"></script></body>
HTML;

$tags = new WP_HTML_Tag_Processor( $html );
while ( $tags->next_tag() ) {
	$tag = $tags->get_tag();
	if ( 'SCRIPT' === $tag || 'STYLE' === $tag ) {
		$tags->set_attribute( 'nonce', $nonce );
	}
}

echo "nonce: {$nonce}\n\n";
echo $tags->get_updated_html();



l = '<figure><img src="https://cdn.test/uploads/photo.jpg" alt="Sunset"></figure>';
$widths = array( 480, 768, 1200 );

$tags = new WP_HTML_Tag_Processor( $html );
while ( $tags->next_tag( 'img' ) ) {
	$src = $tags->get_attribute( 'src' );
	if ( null === $src || $tags->get_attribute( 'srcset' ) !== null ) {
		continue;
	}
	$variants = array();
	foreach ( $widths as $w ) {
		$variants[] = $src . '?w=' . $w . ' ' . $w . 'w';
	}
	$tags->set_attribute( 'srcset', implode( ', ', $variants ) );
	$tags->set_attribute( 'sizes', '(max-width: 768px) 100vw, 768px' );
}

echo $tags->get_updated_html();



 "attribute: " . WP_HTML_Decoder::decode_attribute( 'path?a=1&amp;b=2&amp;copy' ) . "\n";
echo "text:      " . WP_HTML_Decoder::decode_text_node( 'AT&amp;T &mdash; 100&percnt; &#x1F600;' ) . "\n";

// Safe URL prefix check that decodes character references while comparing.
// `&#x6A;` is the letter `j`, so this string really does start with javascript:.
// strpos() would miss it.
$is_javascript = WP_HTML_Decoder::attribute_starts_with(
	'&#x6A;avascript:alert(1)',
	'javascript:',
	'ascii-case-insensitive'
);
var_dump( $is_javascript );



l = <<<'HTML'
<article>
<figure><img src="hero.jpg" alt="Hero"><figcaption>Hero shot</figcaption></figure>
<p>Body copy <img src="emoji.png" alt=""> mid-paragraph.</p>
<figure><img src="diagram.png" alt="Diagram"></figure>
</article>
HTML;

$p = WP_HTML_Processor::create_fragment( $html );
$figure_images = 0;
while ( $p->next_tag( array( 'breadcrumbs' => array( 'FIGURE', 'IMG' ) ) ) ) {
	$p->add_class( 'figure-image' );
	$figure_images++;
}

echo "found {$figure_images} figure images\n";
echo $p->get_updated_html();



l = <<<'HTML'
<section><h1>Title</h1>
<section><h2>Chapter 1</h2><p>Body</p></section>
<section><h2>Chapter 2</h2><p>More body</p></section>
</section>
HTML;

$p = WP_HTML_Processor::create_fragment( $html );
while ( $p->next_token() ) {
	if ( '#tag' !== $p->get_token_type() || $p->is_tag_closer() ) {
		continue;
	}
	$tag = $p->get_tag();
	if ( ! preg_match( '/^H[1-6]$/', $tag ) ) {
		continue;
	}
	$indent = str_repeat( '  ', max( 0, $p->get_current_depth() - 2 ) );
	$text = '';
	while ( $p->next_token() ) {
		if ( '#text' === $p->get_token_type() ) {
			$text .= $p->get_modifiable_text();
			continue;
		}
		if ( '#tag' === $p->get_token_type() && $tag === $p->get_tag() && $p->is_tag_closer() ) {
			break;
		}
	}
	echo "{$indent}{$tag}  {$text}\n";
}



l = <<<'HTML'
<ul>
<li><input type="checkbox" checked> Buy milk</li>
<li><input type="checkbox"> Walk the dog</li>
<li><input type="checkbox" checked> Read book</li>
</ul>
HTML;

$tags = new WP_HTML_Tag_Processor( $html );
$tags->next_tag( 'ul' );
$tags->set_bookmark( 'list' );

$total = 0;
$done = 0;
while ( $tags->next_tag( 'input' ) ) {
	$total++;
	if ( null !== $tags->get_attribute( 'checked' ) ) {
		$done++;
	}
}

$tags->seek( 'list' );
$tags->set_attribute( 'data-progress', $done . '/' . $total );
$tags->release_bookmark( 'list' );

echo $tags->get_updated_html();