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WordPress: get all attachment excluding featured image and display it on template.

<span class="line"><span style="color: #81A1C1"><?</span><span style="color: #D8DEE9">php</span><span style="color: #D8DEE9FF"> </span><span style="color: #88C0D0">if</span><span style="color: #D8DEE9FF"> ( </span><span style="color: #D8DEE9">$post</span><span style="color: #81A1C1">-></span><span style="color: #D8DEE9">post_status</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">==</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">publish</span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF"> ) </span><span style="color: #ECEFF4">{</span></span>
<span class="line"><span style="color: #D8DEE9FF">        </span><span style="color: #D8DEE9">$attachments</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">=</span><span style="color: #D8DEE9FF"> </span><span style="color: #88C0D0">get_posts</span><span style="color: #D8DEE9FF">( </span><span style="color: #88C0D0">array</span><span style="color: #D8DEE9FF">(</span></span>
<span class="line"><span style="color: #D8DEE9FF">            </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">post_type</span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">=></span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">attachment</span><span style="color: #ECEFF4">'</span><span style="color: #ECEFF4">,</span></span>
<span class="line"><span style="color: #D8DEE9FF">            </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">posts_per_page</span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">=></span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">-</span><span style="color: #B48EAD">1</span><span style="color: #ECEFF4">,</span></span>
<span class="line"><span style="color: #D8DEE9FF">            </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">post_parent</span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">=></span><span style="color: #D8DEE9FF"> </span><span style="color: #D8DEE9">$post</span><span style="color: #81A1C1">-></span><span style="color: #D8DEE9">ID</span><span style="color: #ECEFF4">,</span></span>
<span class="line"><span style="color: #D8DEE9FF">            </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">exclude</span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF">     </span><span style="color: #81A1C1">=></span><span style="color: #D8DEE9FF"> </span><span style="color: #88C0D0">get_post_thumbnail_id</span><span style="color: #D8DEE9FF">()</span></span>
<span class="line"><span style="color: #D8DEE9FF">        ) );</span></span>
<span class="line"><span style="color: #D8DEE9FF"> </span></span>
<span class="line"><span style="color: #D8DEE9FF">        </span><span style="color: #88C0D0">if</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">(</span><span style="color: #D8DEE9FF"> </span><span style="color: #D8DEE9">$attachments</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">)</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">{</span></span>
<span class="line"><span style="color: #D8DEE9FF">            </span><span style="color: #88C0D0">foreach</span><span style="color: #D8DEE9FF"> ( </span><span style="color: #D8DEE9">$attachments</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">as</span><span style="color: #D8DEE9FF"> $attachment ) </span><span style="color: #ECEFF4">{</span></span>
<span class="line"><span style="color: #D8DEE9FF">                </span><span style="color: #D8DEE9">$class</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">=</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">"</span><span style="color: #A3BE8C">post-attachment mime-</span><span style="color: #ECEFF4">"</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">.</span><span style="color: #D8DEE9FF"> </span><span style="color: #88C0D0">sanitize_title</span><span style="color: #D8DEE9FF">( </span><span style="color: #D8DEE9">$attachment</span><span style="color: #81A1C1">-></span><span style="color: #D8DEE9">post_mime_type</span><span style="color: #D8DEE9FF"> )</span><span style="color: #81A1C1">;</span></span>
<span class="line"><span style="color: #D8DEE9FF">                </span><span style="color: #D8DEE9">$thumbimg</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">=</span><span style="color: #D8DEE9FF"> </span><span style="color: #88C0D0">wp_get_attachment_link</span><span style="color: #D8DEE9FF">( </span><span style="color: #D8DEE9">$attachment</span><span style="color: #81A1C1">-></span><span style="color: #D8DEE9">ID</span><span style="color: #ECEFF4">,</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C">thumbnail-size</span><span style="color: #ECEFF4">'</span><span style="color: #ECEFF4">,</span><span style="color: #D8DEE9FF"> </span><span style="color: #81A1C1">true</span><span style="color: #D8DEE9FF"> )</span><span style="color: #81A1C1">;</span></span>
<span class="line"><span style="color: #D8DEE9FF">                </span><span style="color: #D8DEE9">echo</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C"><li class="</span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">.</span><span style="color: #D8DEE9FF"> </span><span style="color: #D8DEE9">$class</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">.</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C"> data-design-thumbnail"></span><span style="color: #ECEFF4">'</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">.</span><span style="color: #D8DEE9FF"> </span><span style="color: #D8DEE9">$thumbimg</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">.</span><span style="color: #D8DEE9FF"> </span><span style="color: #ECEFF4">'</span><span style="color: #A3BE8C"></li></span><span style="color: #ECEFF4">'</span><span style="color: #81A1C1">;</span></span>
<span class="line"><span style="color: #D8DEE9FF">            </span><span style="color: #ECEFF4">}</span></span>
<span class="line"><span style="color: #D8DEE9FF">             </span></span>
<span class="line"><span style="color: #D8DEE9FF">        </span><span style="color: #ECEFF4">}</span></span>
<span class="line"><span style="color: #D8DEE9FF">    </span><span style="color: #ECEFF4">}</span></span>
<span class="line"><span style="color: #81A1C1">?></span></span>