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POPHP interesting recursion with element's removing
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  1. POPHP interesting recursion with element's removing
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    copied!<p><br>I have a multidimensional array. And some of array's elements have 'inactive' flag. I need to remove this elements. But downline elements should be go up. I wrote a function, but it works wrong. It works fine only if first array element is inactive. <br>Function:</p> <pre><code>function deleteInactive($children, $generation = 0) { $generation++; $copy = $children; if (!empty($copy) &amp;&amp; is_array($copy)) { foreach ($copy as $key =&gt; $v) { $inactive = false; if (array_key_exists('inactive', $v) &amp;&amp; $v['inactive'] === true) { $nextGeneration = $generation - 1; $inactive = true; $children = deleteInactive($v['children'], $nextGeneration); unset($children[$key]); } else { $nextGeneration = $generation; if (!empty($v['children']) &amp;&amp; is_array($v['children'])) { $children[$key] = $v; $children[$key]['children'] = deleteInactive($v['children'], $generation); } } if (!$inactive) { $children[$key]['generation'] = $nextGeneration; } } } return $children; } </code></pre> <p>Test array:</p> <pre><code>$tree = array( 'id' =&gt; 1000, 'generation' =&gt; 0, 'children' =&gt; array( 1002 =&gt; array( 'id' =&gt; 1002, 'generation' =&gt; 1, 'children' =&gt; array( 1005 =&gt; array( 'id' =&gt; 1005, 'generation' =&gt; 2, 'inactive' =&gt; true, 'children' =&gt; array() ) ) ), 1006 =&gt; array( 'id' =&gt; 1006, 'generation' =&gt; 1, 'inactive' =&gt; true, 'children' =&gt; array( 1007 =&gt; array( 'id' =&gt; 1007, 'generation' =&gt; 2, 'children' =&gt; array() ) ) ), 1008 =&gt; array( 'id' =&gt; 1008, 'generation' =&gt; 1, 'children' =&gt; array( 1009 =&gt; array( 'id' =&gt; 1009, 'generation' =&gt; 2, 'children' =&gt; array() ) ) ) ) ); </code></pre> <p>Testing:</p> <pre><code>print_r($tree); $tree['children'] = deleteInactive($tree['children']); print_r($tree); </code></pre>
 

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