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wp-content/plugins/polylang/integrations/wpseo/wpseo-ogp.php

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+<?php
+/**
+ * @package Polylang
+ */
+
+use Yoast\WP\SEO\Presenters\Abstract_Indexable_Presenter;
+
+/**
+ * Creates an Opengraph alternate locale meta tag to be consumed by Yoast SEO
+ * Requires Yoast SEO 14.0 or newer.
+ *
+ * @since 2.7.3
+ */
+final class PLL_WPSEO_OGP extends Abstract_Indexable_Presenter {
+	/**
+	 * Facebook locale
+	 *
+	 * @var string $locale
+	 */
+	private $locale;
+
+	/**
+	 * Constructor
+	 *
+	 * @since 2.7.3
+	 *
+	 * @param string $locale Facebook locale.
+	 */
+	public function __construct( $locale ) {
+		$this->locale = $locale;
+	}
+
+	/**
+	 * Returns the meta Opengraph alternate locale meta tag
+	 *
+	 * @since 2.7.3
+	 *
+	 * @return string
+	 */
+	public function present() {
+		return sprintf( '<meta property="og:locale:alternate" content="%s" />', esc_attr( $this->get() ) );
+	}
+
+	/**
+	 * Returns the alternate locale
+	 *
+	 * @since 2.7.3
+	 *
+	 * @return string
+	 */
+	public function get() {
+		return $this->locale;
+	}
+}
+