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<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\Admin\Links
*/
/**
* Represents the link extractor.
*/
class WPSEO_Link_Extractor {
/**
* The content to extract the links from.
*
* @var string
*/
protected $content;
/**
* Sets the content.
*
* @param string $content The content to extract the links from.
*/
public function __construct( $content ) {
$this->content = $content;
}
/**
* Extracts the hrefs from the content and returns them as an array.
*
* @return array All the extracted links
*/
public function extract() {
$links = [];
if ( strpos( $this->content, 'href' ) === false ) {
return $links;
}
$regexp = '<a\s[^>]*href=("??)([^" >]*?)\\1[^>]*>';
// Used modifiers iU to match case insensitive and make greedy quantifiers lazy.
if ( preg_match_all( "/$regexp/iU", $this->content, $matches, PREG_SET_ORDER ) ) {
foreach ( $matches as $match ) {
$links[] = trim( $match[2], "'" );
}
}
return $links;
}
}