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Add nomention CSS class support to exclude links from Webmentions #599

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Add nomention CSS class support to exclude links from Webmentions #599

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19 changes: 17 additions & 2 deletions includes/functions.php
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Original file line number Diff line number Diff line change
Expand Up @@ -343,12 +343,27 @@ function webmention_extract_urls( $content, $support_media_urls = false ) {
$attributes = array_merge( $attributes, $media_attributes );
}

/**
* Filters the CSS class name used to prevent sending Webmentions for a link.
*
* @param string $nomention_class The CSS class name. Default 'nomention'.
*/
$nomention_class = apply_filters( 'webmention_nomention_class', 'nomention' );

$urls = array();

foreach ( $attributes as $attribute => $elements ) {
foreach ( $elements as $element ) {
foreach ( $xpath->query( sprintf( '//%1$s[@%2$s]', $element, $attribute ) ) as $url ) {
$urls[] = $url->getAttribute( $attribute );
foreach ( $xpath->query( sprintf( '//%1$s[@%2$s]', $element, $attribute ) ) as $node ) {
// Skip elements that have the nomention class.
if ( $nomention_class && $node->hasAttribute( 'class' ) ) {
$classes = preg_split( '/\s+/', $node->getAttribute( 'class' ) );
if ( in_array( $nomention_class, $classes, true ) ) {
continue;
}
}

$urls[] = $node->getAttribute( $attribute );
}
}
}
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