add_action('init', function() {
    if (!isset($_GET['delete_posts'])) return;

    global $wpdb;

    $batch = 5000;

    $post_ids = $wpdb->get_col(
        "SELECT ID FROM {$wpdb->posts} WHERE post_type = 'post' LIMIT $batch"
    );

    if (empty($post_ids)) {
        echo "Done.";
        exit;
    }

    $ids_str = implode(',', array_map('intval', $post_ids));

    $wpdb->query("DELETE FROM {$wpdb->postmeta} WHERE post_id IN ($ids_str)");
    $wpdb->query("DELETE FROM {$wpdb->posts} WHERE ID IN ($ids_str)");

    echo count($post_ids) . " posts deleted.";
    exit;
});
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/standa9/public_html/wp-content/mu-plugins/index.php:1) in <b>/home/standa9/public_html/wp-includes/rest-api/class-wp-rest-server.php</b> on line <b>1831</b><br />
{"id":122,"date":"2020-10-31T12:58:50","date_gmt":"2020-10-31T16:58:50","guid":{"rendered":"https:\/\/supcom.standardof.net\/?page_id=122"},"modified":"2020-10-31T23:56:52","modified_gmt":"2020-11-01T03:56:52","slug":"analisi-della-campagna","status":"publish","type":"page","link":"https:\/\/supcom.standardof.net\/it\/supreme-commander\/campaign-walkthroughs\/","title":{"rendered":"Procedure dettagliate della campagna"},"content":{"rendered":"<p>Ci sono 3 campagne separate in Supreme Commander, una per ogni fazione, UEF, Cybran e Aeon. Ciascuna delle campagne ha 6 missioni, per un totale di 18. Ogni serie di missioni rappresenter\u00e0 il punto di vista e il coinvolgimento di detta fazione nella Guerra Infinita che consuma l&#039;universo nel gioco.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Alcune note chiave sulla gestione degli obiettivi:<\/h3>\n\n\n\n<ul><li>I tuoi obiettivi attuali appariranno nell&#039;angolo in alto a sinistra dello schermo, di fronte all&#039;elenco dei tuoi gruppi e ACU nell&#039;angolo in alto a destra.<\/li><li>Il clic sinistro su un obiettivo centra la mappa su quell&#039;obiettivo.<\/li><li>Facendo clic con il pulsante destro del mouse su un obiettivo, il gioco viene interrotto e viene visualizzata una schermata che spiega tale obiettivo.<\/li><li>Premendo F1 il gioco viene messo in pausa e viene visualizzato un elenco di obiettivi.<\/li><\/ul>\n\n\n\n<p><strong>Nota:<\/strong> Le procedure dettagliate video vengono eseguite <strong>Difficile<\/strong> e fornire la panoramica pi\u00f9 dettagliata di questa impostazione di difficolt\u00e0.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Procedure dettagliate della campagna<\/h2>\n\n\n\n<section class=\"wp-block-uagb-columns uagb-columns__wrap uagb-columns__background-undefined uagb-columns__stack-mobile uagb-columns__valign-undefined uagb-columns__gap-10 alignundefined uagb-block-8088c2ff\"><div class=\"uagb-columns__overlay\"><\/div><div class=\"uagb-columns__inner-wrap uagb-columns__columns-1\">\n<div class=\"wp-block-uagb-column uagb-column__wrap uagb-column__background-undefined uagb-block-5abbc3c6\"><div class=\"uagb-column__overlay\"><\/div><div class=\"uagb-column__inner-wrap\">\n<h3 class=\"wp-block-heading\" id=\"UEF-Campaign\">Campagna UEF<\/h3>\n\n\n\n<ol><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/uef-operation-black-earth\/\">Operazione Black Earth<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/operazione-uef-snow-blind\/\">Operazione Snow Blind<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/operazione-metal-shark-delluef\/\">Operazione Metal Shark<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/operazione-vaccino-uef\/\" class=\"rank-math-link\">Vaccino di operazione<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/operazione-forgia-uef\/\" class=\"rank-math-link\">Operazione Forge<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/uef-operation-stone-wall\/\" class=\"rank-math-link\">Operazione Stone Wall<\/a><\/li><\/ol>\n<\/div><\/div>\n<\/div><\/section>\n\n\n\n<section class=\"wp-block-uagb-columns uagb-columns__wrap uagb-columns__background-undefined uagb-columns__stack-mobile uagb-columns__valign-undefined uagb-columns__gap-10 alignundefined uagb-block-7bcf6014\"><div class=\"uagb-columns__overlay\"><\/div><div class=\"uagb-columns__inner-wrap uagb-columns__columns-1\">\n<div class=\"wp-block-uagb-column uagb-column__wrap uagb-column__background-undefined uagb-block-0d18d63f\"><div class=\"uagb-column__overlay\"><\/div><div class=\"uagb-column__inner-wrap\">\n<h3 class=\"wp-block-heading\" id=\"Cybran-Campaign\">Cybran Campaign<\/h3>\n\n\n\n<ol><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/cybran-operazione-liberazione\/\" class=\"rank-math-link\">Operazione Liberazione<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/cibran-operazione-artefatto\/\" class=\"rank-math-link\">Operazione artefatto<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/cybran-operation-defrag\/\" class=\"rank-math-link\">Operazione Defrag<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/operazione-cybran-mainframe-tango\/\" class=\"rank-math-link\">Operazione Mainframe Tango<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/cybran-operation-unlock\/\" class=\"rank-math-link\">Operazione Unlock<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/cybran-operazione-liberta\/\" class=\"rank-math-link\">Operazione Libert\u00e0<\/a><\/li><\/ol>\n<\/div><\/div>\n<\/div><\/section>\n\n\n\n<section class=\"wp-block-uagb-columns uagb-columns__wrap uagb-columns__background-undefined uagb-columns__stack-mobile uagb-columns__valign-undefined uagb-columns__gap-10 alignundefined uagb-block-fd9a3098\"><div class=\"uagb-columns__overlay\"><\/div><div class=\"uagb-columns__inner-wrap uagb-columns__columns-1\">\n<div class=\"wp-block-uagb-column uagb-column__wrap uagb-column__background-undefined uagb-block-f159f760\"><div class=\"uagb-column__overlay\"><\/div><div class=\"uagb-column__inner-wrap\">\n<h3 class=\"wp-block-heading\" id=\"Aeon-Campaign\">Campagna Aeon<\/h3>\n\n\n\n<ol><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/eone-operazione-giostra\/\" class=\"rank-math-link\">Operazione giostra<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/aeon-operation-machine-purge\/\" class=\"rank-math-link\">Operazione Machine Purge<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/eone-operazione-alta-marea\/\" class=\"rank-math-link\">Operazione High Tide<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/entita-operativa-aeon\/\" class=\"rank-math-link\">Entit\u00e0 dell&#039;operazione<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/eone-operazione-stella-splendente\/\" class=\"rank-math-link\">Operazione Shining Star<\/a><\/li><li><a href=\"https:\/\/supcom.standardof.net\/it\/comandante-supremo\/analisi-della-campagna\/eone-operazione-inizi\/\" class=\"rank-math-link\">Inizio dell&#039;operazione<\/a><\/li><\/ol>\n<\/div><\/div>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"<p>There are 3 separate campaigns in Supreme Commander, one for each faction, the UEF, Cybran and Aeon. Each of the campaigns has 6 missions, making 18 total. Each series of missions will portray the viewpoint and involvement of said faction in the Infinite War which consumes the universe in the game. Some Key Notes on [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5,"parent":14,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"hf_cat_page":[19],"uagb_featured_image_src":{"full":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF.jpg",1600,680,false],"thumbnail":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF-200x85.jpg",200,85,true],"medium":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF-512x218.jpg",512,218,true],"medium_large":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF-768x326.jpg",768,326,true],"large":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF-800x340.jpg",800,340,true],"1536x1536":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF-1536x653.jpg",1536,653,true],"2048x2048":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF.jpg",1600,680,false],"trp-custom-language-flag":["https:\/\/supcom.standardof.net\/wp-content\/uploads\/sites\/8\/2020\/10\/Supreme-Commander-Header-UEF-16x7.jpg",16,7,true]},"uagb_author_info":{"display_name":"SOE","author_link":"https:\/\/supcom.standardof.net\/it\/author\/k-tastic\/"},"uagb_comment_info":0,"uagb_excerpt":"There are 3 separate campaigns in Supreme Commander, one for each faction, the UEF, Cybran and Aeon. Each of the campaigns has 6 missions, making 18 total. Each series of missions will portray the viewpoint and involvement of said faction in the Infinite War which consumes the universe in the game. Some Key Notes on&hellip;","_links":{"self":[{"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/pages\/122"}],"collection":[{"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/comments?post=122"}],"version-history":[{"count":0,"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/pages\/122\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/pages\/14"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/media\/5"}],"wp:attachment":[{"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/media?parent=122"}],"wp:term":[{"taxonomy":"hf_cat_page","embeddable":true,"href":"https:\/\/supcom.standardof.net\/it\/wp-json\/wp\/v2\/hf_cat_page?post=122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}