{"id":46220,"date":"2012-12-29T02:22:35","date_gmt":"2012-12-29T00:22:35","guid":{"rendered":"https:\/\/nl.wordpress.org\/support\/topic\/query_postsquery_stringcustom-metabox\/"},"modified":"2016-08-04T23:51:10","modified_gmt":"2016-08-04T23:51:10","slug":"query_postsquery_stringcustom-metabox","status":"closed","type":"topic","link":"https:\/\/nl.wordpress.org\/support\/topic\/query_postsquery_stringcustom-metabox\/","title":{"rendered":"query_posts($query_string.&#039;&amp;custom metabox&#039;);"},"content":{"rendered":"<p>Ik wil graag voor een autodealer een voorpagina hebben waar ik met een dropdown menu kan kiezen voor 1 bepaald merk (in plaats van alle posts)<br \/>\nDropdown werkt. Wordt &#8220;bevolkt&#8221; door alle waarden die de custom meta box mh_merk heeft met de volgende code:<\/p>\n<pre><code>&lt;form name=&quot;search&quot; action=&quot;&quot; method=&quot;get&quot;&gt;\n  &lt;select name=&quot;Merk&quot;&gt;\n  &lt;?php\n  $metakey = &#039;mh_merk&#039;;\n  $merk = $wpdb-&gt;get_col($wpdb-&gt;prepare(&quot;SELECT DISTINCT meta_value FROM $wpdb-&gt;postmeta WHERE meta_key = %s ORDER BY meta_value ASC&quot;, $metakey) );\n  if ($merk) {\n    foreach ($merk as $mh_merk) {\n      echo &quot;&lt;option value=\\&quot;&quot; . $mh_merk . &quot;\\&quot;&gt;&quot; . $mh_merk . &quot;&lt;\/option&gt;&quot;;\n    }\n  }\n  ?&gt;\n  &lt;\/select&gt;\n  &lt;input type=&quot;submit&quot; value=&quot;search&quot; \/&gt;\n&lt;\/form&gt;<\/code><\/pre>\n<p>Vraag 1 is dan: hoe maak ik de gekozen waarde zichtbaar ? Met echo ?<\/p>\n<p>Dan vraag 2:<br \/>\nIk denk (goed geraden ik ben GEEN PHP coder) dat $merk de waarde bevat die gekozen is ? Zo ja, hoe filter ik dan in de index.php uitsluitend posts met het aangeklikte merk ?<br \/>\nDus:<\/p>\n<p><code>&lt;?php query_posts($query_string.&#039;&amp;category_name=Landrover&#039;); ?&gt;<\/code><\/p>\n<p>werkt, maar hoe vervang ik &#8216;&amp;category_name=Landrover&#8217; door<br \/>\nde gekozen waarde ? ($merk ?)<\/p>\n<p>Oh ja, ik ben ECHT geen coder&#8230;.<\/p>\n","protected":false},"template":"","class_list":["post-46220","topic","type-topic","status-closed","hentry","topic-tag-custom-metabox-filter-query"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/nl.wordpress.org\/support\/wp-json\/wp\/v2\/topic\/46220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nl.wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/nl.wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/nl.wordpress.org\/support\/wp-json\/wp\/v2\/topic\/46220\/revisions"}],"wp:attachment":[{"href":"https:\/\/nl.wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=46220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}