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<?php

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// Exit if accessed directly.

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if ( ! defined( 'ABSPATH' ) ) exit;

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add_action('amp_post_template_head', 'ampforwp_default_og_tags', 50);

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if ( ! function_exists('ampforwp_default_og_tags') ) {

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function ampforwp_default_og_tags(){

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global $wp;

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if ( true == ampforwp_get_setting('ampforwp-seo-og-meta-tags') && '' == ampforwp_get_setting('ampforwp-seo-selection') ) {

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$og_tags = array();

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$post_id = $post = $locale = $type = $title = $site_title = $desc = $url = $pub_date = $mod_date = $image = $image_width = $image_height = '';

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$post_id = ampforwp_get_the_ID();

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$post = get_post($post_id);

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// og:locale

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$locale = get_locale();

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// Catch some weird locales served out by WP that are not easily doubled up.

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$fix_locales = array(

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'ca' => 'ca_ES',

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'en' => 'en_US',

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'el' => 'el_GR',

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'et' => 'et_EE',

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'ja' => 'ja_JP',

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'sq' => 'sq_AL',

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'uk' => 'uk_UA',

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'vi' => 'vi_VN',

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'zh' => 'zh_CN',

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);

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if ( isset( $fix_locales[ $locale ] ) ) {

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$locale = $fix_locales[ $locale ];

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}

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// Convert locales like "es" to "es_ES", in case that works for the given locale (sometimes it does).

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if ( strlen( $locale ) === 2 ) {

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$locale = strtolower( $locale ) . '_' . strtoupper( $locale );

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}

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// These are the locales FB supports.

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$valid_fb_locales = array(

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'af_ZA', // Afrikaans.

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'ak_GH', // Akan.

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'am_ET', // Amharic.

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'ar_AR', // Arabic.

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'as_IN', // Assamese.

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'ay_BO', // Aymara.

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'az_AZ', // Azerbaijani.

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'be_BY', // Belarusian.

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'bg_BG', // Bulgarian.

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'bp_IN', // Bhojpuri.

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'bn_IN', // Bengali.

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'br_FR', // Breton.

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'bs_BA', // Bosnian.

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'ca_ES', // Catalan.

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'cb_IQ', // Sorani Kurdish.

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'ck_US', // Cherokee.

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'co_FR', // Corsican.

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'cs_CZ', // Czech.

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'cx_PH', // Cebuano.

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'cy_GB', // Welsh.

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'da_DK', // Danish.

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'de_DE', // German.

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'el_GR', // Greek.

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'en_GB', // English (UK).

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'en_PI', // English (Pirate).

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'en_UD', // English (Upside Down).

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'en_US', // English (US).

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'em_ZM',

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'eo_EO', // Esperanto.

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'es_ES', // Spanish (Spain).

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'es_LA', // Spanish.

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'es_MX', // Spanish (Mexico).

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'et_EE', // Estonian.

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'eu_ES', // Basque.

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'fa_IR', // Persian.

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'fb_LT', // Leet Speak.

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'ff_NG', // Fulah.

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'fi_FI', // Finnish.

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'fo_FO', // Faroese.

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'fr_CA', // French (Canada).

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'fr_FR', // French (France).

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'fy_NL', // Frisian.

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'ga_IE', // Irish.

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'gl_ES', // Galician.

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'gn_PY', // Guarani.

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'gu_IN', // Gujarati.

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'gx_GR', // Classical Greek.

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'ha_NG', // Hausa.

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'he_IL', // Hebrew.

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'hi_IN', // Hindi.

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'hr_HR', // Croatian.

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'hu_HU', // Hungarian.

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'ht_HT', // Haitian Creole.

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'hy_AM', // Armenian.

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'id_ID', // Indonesian.

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'ig_NG', // Igbo.

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'is_IS', // Icelandic.

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'it_IT', // Italian.

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'ik_US',

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'iu_CA',

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'ja_JP', // Japanese.

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'ja_KS', // Japanese (Kansai).

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'jv_ID', // Javanese.

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'ka_GE', // Georgian.

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'kk_KZ', // Kazakh.

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'km_KH', // Khmer.

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'kn_IN', // Kannada.

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'ko_KR', // Korean.

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'ks_IN', // Kashmiri.

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'ku_TR', // Kurdish (Kurmanji).

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'ky_KG', // Kyrgyz.

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'la_VA', // Latin.

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'lg_UG', // Ganda.

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'li_NL', // Limburgish.

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'ln_CD', // Lingala.

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'lo_LA', // Lao.

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'lt_LT', // Lithuanian.

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'lv_LV', // Latvian.

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'mg_MG', // Malagasy.

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'mi_NZ', // Maori.

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'mk_MK', // Macedonian.

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'ml_IN', // Malayalam.

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'mn_MN', // Mongolian.

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'mr_IN', // Marathi.

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'ms_MY', // Malay.

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'mt_MT', // Maltese.

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'my_MM', // Burmese.

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'nb_NO', // Norwegian (bokmal).

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'nd_ZW', // Ndebele.

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'ne_NP', // Nepali.

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'nl_BE', // Dutch (Belgie).

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'nl_NL', // Dutch.

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'nn_NO', // Norwegian (nynorsk).

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'nr_ZA', // Southern Ndebele.

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'ns_ZA', // Northern Sotho.

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'ny_MW', // Chewa.

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'om_ET', // Oromo.

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'or_IN', // Oriya.

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'pa_IN', // Punjabi.

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'pl_PL', // Polish.

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'ps_AF', // Pashto.

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'pt_BR', // Portuguese (Brazil).

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'pt_PT', // Portuguese (Portugal).

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'qc_GT', // Quiché.

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'qu_PE', // Quechua.

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'qr_GR',

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'qz_MM', // Burmese (Zawgyi).

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'rm_CH', // Romansh.

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'ro_RO', // Romanian.

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'ru_RU', // Russian.

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'rw_RW', // Kinyarwanda.

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'sa_IN', // Sanskrit.

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'sc_IT', // Sardinian.

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'se_NO', // Northern Sami.

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'si_LK', // Sinhala.

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'su_ID', // Sundanese.

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'sk_SK', // Slovak.

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'sl_SI', // Slovenian.

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'sn_ZW', // Shona.

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'so_SO', // Somali.

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'sq_AL', // Albanian.

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'sr_RS', // Serbian.

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'ss_SZ', // Swazi.

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'st_ZA', // Southern Sotho.

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'sv_SE', // Swedish.

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'sw_KE', // Swahili.

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'sy_SY', // Syriac.

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'sz_PL', // Silesian.

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'ta_IN', // Tamil.

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'te_IN', // Telugu.

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'tg_TJ', // Tajik.

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'th_TH', // Thai.

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'tk_TM', // Turkmen.

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'tl_PH', // Filipino.

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'tl_ST', // Klingon.

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'tn_BW', // Tswana.

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'tr_TR', // Turkish.

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'ts_ZA', // Tsonga.

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'tt_RU', // Tatar.

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'tz_MA', // Tamazight.

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'uk_UA', // Ukrainian.

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'ur_PK', // Urdu.

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'uz_UZ', // Uzbek.

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've_ZA', // Venda.

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'vi_VN', // Vietnamese.

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'wo_SN', // Wolof.

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'xh_ZA', // Xhosa.

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'yi_DE', // Yiddish.

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'yo_NG', // Yoruba.

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'zh_CN', // Simplified Chinese (China).

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'zh_HK', // Traditional Chinese (Hong Kong).

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'zh_TW', // Traditional Chinese (Taiwan).

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'zu_ZA', // Zulu.

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'zz_TR', // Zazaki.

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);

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// Check to see if the locale is a valid FB one, if not, use en_US as a fallback.

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if ( ! in_array( $locale, $valid_fb_locales, true ) ) {

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$locale = strtolower( substr( $locale, 0, 2 ) ) . '_' . strtoupper( substr( $locale, 0, 2 ) );

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if ( ! in_array( $locale, $valid_fb_locales, true ) ) {

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$locale = 'en_US';

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}

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}

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$og_tags['og:locale'] = $locale;

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// og:type

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if ( is_home() ) {

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$type = 'website';

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}

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elseif ( is_singular() ) {

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$type = 'article';

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}

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else {

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// We use "object" for archives

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$type = 'object';

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}

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$og_tags['og:type'] = $type;

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// og:title

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$sep = apply_filters( 'document_title_separator', '-' );

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if ( ampforwp_is_home() ) {

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$site_title = get_bloginfo( 'name' ) . $sep . get_option( 'blogdescription' );

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}

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if ( is_singular() || ampforwp_is_front_page() || ampforwp_is_blog() ) {

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$title = ! empty( $post->post_title ) ? $post->post_title : $title;

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$site_title = $title . $sep . get_option( 'blogname' );

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}

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if ( is_archive() ) {

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$site_title = strip_tags( get_the_archive_title('') . $sep . get_bloginfo( 'name' ) );

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}

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if ( is_search() ) {

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$site_title = $redux_builder_amp['amp-translator-search-text'] . ' ' . get_search_query();

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}

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$og_tags['og:title'] = $site_title;

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// og:description

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if ( ampforwp_is_home() || ampforwp_is_blog() ) {

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$desc = addslashes( strip_tags( get_bloginfo( 'description' ) ) );

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}

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if ( is_archive() ) {

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$desc = addslashes( strip_tags( get_the_archive_description() ) );

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}

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if ( is_single() || is_page() ) {

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if ( has_excerpt() ) {

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$desc = get_the_excerpt();

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} else {

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$desc = $post->post_content;

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}

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$desc = preg_replace('/\[(.*?)\]/',' ', $desc);

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$desc = addslashes( wp_trim_words( strip_tags( $desc ) , 15 ) );

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}

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if ( is_search() ) {

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$desc = addslashes( ampforwp_translation($redux_builder_amp['amp-translator-search-text'], 'You searched for:') . ' ' . get_search_query() );

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}

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if ( ampforwp_is_front_page() ) {

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$desc = addslashes( wp_trim_words( strip_tags( get_post_field('post_content', $post_id) ) , 15 ) );

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}

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$og_tags['og:description'] = $desc;

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// og:url

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$url = get_permalink( $post_id );

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if ( ampforwp_is_home() || ampforwp_is_front_page() || is_archive() ) {

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$current_archive_url = home_url( $wp->request );

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$url = trailingslashit($current_archive_url);

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$remove = '/'. AMPFORWP_AMP_QUERY_VAR;

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$url = str_replace($remove, '', $url);

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$query_arg_array = $wp->query_vars;

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if( array_key_exists( "page" , $query_arg_array ) ) {

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$page = $wp->query_vars['page'];

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if ( $page >= '2') {

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$url = trailingslashit( $url . '?page=' . $page);

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}

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}

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}

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$og_tags['og:url'] = $url;

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// og:site_name

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$og_tags['og:site_name'] = get_bloginfo( 'name' );

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if ( is_singular() ) {

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// article:published_time

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$pub_date = mysql2date( DATE_W3C, $post->post_date_gmt, false );

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$og_tags['article:published_time'] = $pub_date;

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// article:modified_time

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$mod_date = mysql2date( DATE_W3C, $post->post_modified_gmt, false );

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if ( $mod_date !== $pub_date ) {

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$og_tags['article:modified_time'] = $mod_date;

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$og_tags['og:updated_time'] = $mod_date;

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}

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}

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// og:image

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$image = ampforwp_get_post_thumbnail('url', 'full');

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if ( $image ) {

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$image_width = ampforwp_get_post_thumbnail('width', 'full');

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$image_height = ampforwp_get_post_thumbnail('height', 'full');

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$og_tags['og:image'] = $image;

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$og_tags['og:image:width'] = $image_width;

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$og_tags['og:image:height'] = $image_height;

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}

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foreach ( $og_tags as $property => $content ) {

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if ( $content ) {

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echo '<meta property="', esc_attr( $property ), '" content="', esc_attr( $content ), '" />', "\n";

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}

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}

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}

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}

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}

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