{"id":708,"date":"2013-06-28T19:23:03","date_gmt":"2013-06-28T19:23:03","guid":{"rendered":"http:\/\/musilda.cz\/?p=708"},"modified":"2013-06-28T19:23:03","modified_gmt":"2013-06-28T19:23:03","slug":"automaticke-vytvoreni-nahledoveho-obrazku-z-prvniho-obrazku-v-clanku","status":"publish","type":"post","link":"https:\/\/affinite.io\/cs\/automaticke-vytvoreni-nahledoveho-obrazku-z-prvniho-obrazku-v-clanku\/","title":{"rendered":"Automatick\u00e9 vytvo\u0159en\u00ed n\u00e1hledov\u00e9ho obr\u00e1zku z prvn\u00edho obr\u00e1zku v \u010dl\u00e1nku"},"content":{"rendered":"<p>M\u00e1te web se spoustou \u010dl\u00e1nk\u016f a u\u017e v\u00e1m nevyhovuje star\u00fd vzhled webu? Nen\u00ed nic jednodu\u0161\u0161\u00edho, ne\u017e si vybrat p\u011bknou \u0161ablonu a str\u00e1nky za\u010dnou p\u016fsobit modern\u00edm dojmem. Co ale n\u00e1hledov\u00e9 obr\u00e1zky? J\u00edt do ka\u017ed\u00e9ho \u010dl\u00e1nku a ru\u010dn\u011b vkl\u00e1dat obr\u00e1zky mus\u00ed b\u00fdt hrozn\u00e1 p\u0159edstava. S dne\u0161n\u00edm n\u00e1vodem tedy ud\u011bl\u00e1m radost v\u0161em, kte\u0159\u00ed \u0159e\u0161\u00ed podobn\u00fd probl\u00e9m. Jedin\u00e9 omezen\u00ed tohoto \u0159e\u0161en\u00ed je, \u017ee ka\u017ed\u00fd obr\u00e1zek bude vlo\u017een jako n\u00e1hledov\u00fd pouze jednou. Pokud je pou\u017eit ve v\u00edce \u010dl\u00e1nc\u00edch, bude p\u0159i\u0159azen pouze jednou.<\/p>\n<p>Do functions.php vlo\u017e\u00edme n\u00e1sleduj\u00edc\u00ed k\u00f3d:<\/p>\n<pre lang=\"php\">\nfunction auto_featured_image() {\n    global $post;\n\n    if (!has_post_thumbnail($post-&gt;ID)) {\n        $attached_image = get_children( \"post_parent=$post-&gt;ID&amp;post_type=attachment\n        &amp;post_mime_type=image&amp;numberposts=1\" );\n\n\t  if ($attached_image) {\n              foreach ($attached_image as $attachment_id =&gt; $attachment) {\n                   set_post_thumbnail($post-&gt;ID, $attachment_id);\n              }\n         }\n    }\n}\n<\/pre>\n<p>Funkci mus\u00edme p\u0159i\u0159adit n\u011bjak\u00e9 akci a zde z\u00e1le\u017e\u00ed na tom, zda chceme vytv\u00e1\u0159et n\u00e1hledov\u00fd obr\u00e1zek automaticky p\u0159i ulo\u017een\u00ed \u010dl\u00e1nku, nebo zda chceme jen proj\u00edt v\u0161echny \u010dl\u00e1nky a pokud nemaj\u00ed n\u00e1hledov\u00e9 obr\u00e1zky, tak je vygenerovat.<br \/>\nPokud chceme funkci vyu\u017e\u00edvat st\u00e1le, p\u0159id\u00e1me pod funkci n\u00e1sleduj\u00edc\u00ed \u010d\u00e1st k\u00f3du:<\/p>\n<pre lang=\"php\">\nadd_action('save_post', 'auto_featured_image');\nadd_action('draft_to_publish', 'auto_featured_image');\nadd_action('new_to_publish', 'auto_featured_image');\nadd_action('pending_to_publish', 'auto_featured_image');\nadd_action('future_to_publish', 'auto_featured_image');\n<\/pre>\n<p>T\u00edm by jste m\u011bli generovat obr\u00e1zek nejen p\u0159i publikaci \u010dl\u00e1nku, ale i \u010dl\u00e1nku \u010dekaj\u00edc\u00edch na publikaci, \u010di schv\u00e1len\u00ed.<\/p>\n<p>A nyn\u00ed se dost\u00e1v\u00e1me k tomu hlavn\u00edmu. P\u0159idejte do functions.php tento \u0159\u00e1dek pod funkci:<\/p>\n<pre lang=\"php\">add_action('the_post', 'auto_featured_image');<\/pre>\n<p>Pokud se \u010dl\u00e1nek zobraz\u00ed, m\u011bl by se automaticky vygenerovat n\u00e1hledov\u00fd obr\u00e1zek. Co\u017e je po\u0159\u00e1d jednodu\u0161\u0161\u00ed, ne\u017e je ru\u010dn\u011b vkl\u00e1dat. Pokud by bylo \u010dl\u00e1nk\u016f ne\u00fam\u011brn\u00e9 mno\u017estv\u00ed, dala by se funkce upravit pro projit\u00ed v\u0161ech \u010dl\u00e1nk\u016f v datab\u00e1zi a vygenerov\u00e1n\u00ed n\u00e1hledu. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u00e1te web se spoustou \u010dl\u00e1nk\u016f a u\u017e v\u00e1m nevyhovuje star\u00fd vzhled webu? Nen\u00ed nic jednodu\u0161\u0161\u00edho, ne\u017e si vybrat p\u011bknou \u0161ablonu a str\u00e1nky za\u010dnou p\u016fsobit modern\u00edm dojmem. Co ale n\u00e1hledov\u00e9 obr\u00e1zky? J\u00edt do ka\u017ed\u00e9ho \u010dl\u00e1nku a ru\u010dn\u011b vkl\u00e1dat obr\u00e1zky mus\u00ed b\u00fdt hrozn\u00e1 p\u0159edstava. S dne\u0161n\u00edm n\u00e1vodem tedy ud\u011bl\u00e1m radost v\u0161em, kte\u0159\u00ed \u0159e\u0161\u00ed podobn\u00fd probl\u00e9m. Jedin\u00e9 omezen\u00ed<\/p>\n","protected":false},"author":1,"featured_media":8624,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,30],"tags":[246],"class_list":["post-708","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-navody","category-wordpress","tag-nahledove-obrazky"],"_links":{"self":[{"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/posts\/708"}],"collection":[{"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/comments?post=708"}],"version-history":[{"count":0,"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/posts\/708\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/media\/8624"}],"wp:attachment":[{"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/media?parent=708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/categories?post=708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/affinite.io\/cs\/wp-json\/wp\/v2\/tags?post=708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}