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PORecursive function with only one parent and one request
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2013-11-19T10:30:11.347
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I want to display a tree of folders. My folders have security access. I define the security only for the first folder, after each subfolder herit. I want to build a recursive function to display all folders available. Here is my data : <pre><code>Folder 1 : {parent, id, label, security_access} - Folder 2 : {parent, id, label} - Folder 3 : {parent, id, label} - Folder 4 : {parent, id, label} Folder 5 : {parent, id, label, security_access} - Folder 6 : {parent, id, label} ... </code></pre> So I get first level folders with security_access (considering $free_folders variable), but how to loop through subfolders ? With only 1 database request, I have a lot of folders and I can't have 200 requests. Here is my code and I can't find when to use recursion : <pre><code>$folders = $this->db->get_where('file', array('mime' => 'directory'))->result(); $folders_output = array(); foreach($folders as $folder) { $folders_all[$folder->parent_id][] = array( 'label' => $folder->name, 'parent' => $folder->parent_id, 'id' => $folder->id, ); } foreach ($folders as $folder) { // Get first level folders (parent_id = 1) // $folder_free contains files accessible to users if ($folder->parent_id == 1 && in_array($folder->id, $folders_free)) { $folders_output[$folder->id]->parent = $folder->parent_id; $folders_output[$folder->id]->label = $folder->name; $folders_output[$folder->id]->id = $folder->id; } } // Loop each first level folder $_parent = 0; foreach($folders_output as $id => $folder) { do { // ... 14th infinite loop // How can I push each subfolders of my first level folder ? $parent = $folders_all[$id][0]['parent']; } while ($_parent != 1); } // Show unordored list with folders - works ! $treeview = $this->treeview(1, 0, $folders_output); </code></pre> I really can't find the easiest solution.. Thanks ! Ok I think it's ok .. I used recursive function, not really a smart way I think when I see my results... : <pre><code>foreach($folders_free as $folder) { $_results[] = $this->_dossiers($folders_all, $folder); } ------------------------------------------------ private function _dossiers($array, $parent) { $results = array(); foreach ($array AS $entry) { if ($entry->parent == $parent) { $object = new stdClass(); $object->parent = $entry->parent; $object->id = $entry->id; $object->label = $entry->label; $results[] = $object; // Recursive call $results[] = $this->_dossiers($array, $entry->id); } } return $results; } </code></pre>
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<php><recursion>
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Recursive function with only one parent and one request
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1. USVincent Decaux
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