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POGroup pairs in array
 

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    <p>I'm trying to group airlines with relations into single chains.</p> <pre><code>Array ( [0] =&gt; Array ( [0] =&gt; Aeroflot [1] =&gt; S7 [2] =&gt; Transaero ) [1] =&gt; Array ( [0] =&gt; Alitalia [1] =&gt; Lufthansa ) [2] =&gt; Array ( [0] =&gt; Transaero [1] =&gt; United ) [3] =&gt; Array ( [0] =&gt; United [1] =&gt; Alitalia ) [4] =&gt; Array ( [0] =&gt; Volotea [1] =&gt; Iberia ) [5] =&gt; Array ( [0] =&gt; Transaero [1] =&gt; Aeroflot ) ) </code></pre> <p>From that array I need to find connections between elements and combine it to groups. Expected results:</p> <pre><code>Array ( [0] =&gt; Array ( [0] =&gt; Aeroflot [1] =&gt; S7 [2] =&gt; Transaero [3] =&gt; United [4] =&gt; Alitalia [5] =&gt; Lufthansa ) [1] =&gt; Array ( [0] =&gt; Volotea [1] =&gt; Iberia ) ) </code></pre> <p>Can anyone help with that? I've tried a dozen of ways but still get no success.</p> <p>The most closest way I've tried which works but not in all cases:</p> <pre><code> function array_searchRecursive($needle,$haystack) { foreach($haystack as $key=&gt;$value) { $current_key=$key; if($needle===$value OR (is_array($value) &amp;&amp; array_searchRecursive($needle,$value) !== false)) { return $current_key; } } return false; } foreach ($newarr as $key =&gt; $airlines) { foreach ($airlines as $lastkey =&gt; $airline) { $index = array_searchRecursive($airline,$newarr); echo $airline.$index."\n"; if ($index !== false) { $newarr[$index] = array_merge($newarr[$index],$airlines); $lastarr[] = $index; } } } </code></pre> <p>But it doesn't match all values in array.</p>
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    1. COWhy don't you provide a few ways you have tried, and we can help you from there?
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    2. COThanks for advice, first time here. Updated and added the way which almost give me expected results but still fails.
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