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PO
 

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    <p>Try the below code</p> <pre class="lang-php prettyprint-override"><code>$prevIssue_arr = $comic-&gt;xpath('preceding-sibling::*[1]'); $prevIssue = (isset($prevIssue_arr[0])) ? $prevIssue_arr[0]-&gt;mainsection-&gt;series-&gt;displayname : ''; $nextIssue_arr = $comic-&gt;xpath('following-sibling::*[1]'); $nextIssue = (isset($nextIssue_arr[0])) ? $nextIssue_arr[0]-&gt;mainsection-&gt;series-&gt;displayname : ''; echo ... </code></pre> <p>[Edited] </p> <p>The others have already explained why the code did not work </p> <p>One is that the <code>xpath()</code> method returns an array of SimpleXMLElement objects. If no matching node is found, an empty array is returned. </p> <p>The other is that without the predicate <code>[1]</code> or <code>[position()=1]</code> in the location path, all the preceding or succeeding <code>comic</code> nodes would be returned. </p> <p>Alternatively you can use the location path <code>'following-sibling::comic[1]/mainsection/series'</code> to get just the required <code>series</code> node from the immediate succeeding sibling. If there were multiple <code>series</code> nodes, the position would have to be given or all of them would be returned. </p> <p>So using this location path </p> <pre><code>$prevIssue_arr = $comic-&gt;xpath('preceding-sibling::comic[1]/mainsection/series'); $prevIssue = (isset($prevIssue_arr[0])) ? $prevIssue_arr[0]-&gt;displayname : ''; $nextIssue_arr = $comic-&gt;xpath('following-sibling::comic[1]/mainsection/series'); $nextIssue = (isset($nextIssue_arr[0])) ? $nextIssue_arr[0]-&gt;displayname : ''; </code></pre>
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    1. COThis is probably the right answer, but it would be much more useful if you explained *why* this will fix it, so that the answer can be applied to more than just one situation.
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    2. CO@IMSoP right. added some explanation now.
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    3. COThat seems to be working great. Thanks :)
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