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Code Editor : Memory_DBsimple.php
<?php // // $Id: Memory_DBsimple.php 175303 2004-12-21 19:59:20Z dufuz $ // //ini_set('include_path',realpath(dirname(__FILE__).'/../../').':'.realpath(dirname(__FILE__).'/../../../includes').':'.ini_get('include_path')); //ini_set('error_reporting',E_ALL); /** * this is a helper function, so i dont have to write so many prints :-) * @param array $para the result returned by some method, that will be dumped * @param string $string the explaining string */ function dumpHelper($para, $string = '', $addArray = false) { global $tree,$element; if ($addArray) { eval("\$res=array(".$para.');'); } else { eval("\$res=".$para.';'); } echo '<b>' . $para . ' </b><i><u><font color="#008000">' . $string . '</font></u></i><br>'; // this method dumps to the screen, since print_r or var_dump dont // work too good here, because the inner array is recursive // well, it looks ugly but one can see what is meant :-) $tree->varDump($res); echo '<br>'; } /** * dumps the entire structure nicely * @param string $string the explaining string */ function dumpAllNicely($string = '') { global $tree; echo '<i><u><font color="#008000">' . $string . '</font></u></i><br>'; $all = $tree->getNode(); // get the entire structure sorted as the tree is, so we can simply foreach through it and show it foreach($all as $aElement) { for ($i = 0; $i < $aElement['level']; $i++) { echo ' '; } echo $aElement['name'].' ===> '; $tree->varDump(array($aElement)); } echo '<br>'; } /* use this to build the db table CREATE TABLE test_tree ( id int(11) NOT NULL auto_increment, parentId int(11) NOT NULL default '0', name varchar(255) NOT NULL default '', PRIMARY KEY (id) ) This example demonstrates how to manage trees that are saved in a DB, it uses a very simple DB-structure, not nested trees (ok, that sucks, but it can be implemented :-) ) it reads out the entire tree upon calling the method 'setup', then you can work on the tree in whichever way you want, just have a look at the examples there are different ways to achieve things, i will try to demonstrate (all of) them */ require_once 'Tree/Tree.php'; // define the DB-table where the data shall be read from $options = array('table' => 'test_tree', 'order' => 'id' // when reading the data from the db sort them by id, this is only for ensuring // for 'getNext' of "myElement/subElement" in this example to find "myElement/anotherSubElement" // you can simply sort it by "name" and it would be in alphabetical order ); // calling 'setupMemory' means to retreive a class, which works on trees, // that are temporarily stored in the memory, in an array // this means the entire tree is available at all time // consider the resource usage and it's not to suggested to work // on huge trees (upto 1000 elements it should be ok, depending on your environment and requirements) // using 'setupMemory' $tree = Tree::setupMemory('DBsimple', // use the simple DB schema 'mysql://root@localhost/tree_test', // the DSN $options); // pass the options we had assigned up there // add a new root element in the tree $parentId = $tree->add(array('name' => 'myElement')); // add an element under the new element we added $id = $tree->add(array('name' => 'subElement') , $parentId ); // add another element under the parent element we added $id = $tree->add(array('name' => 'anotherSubElement') , $parentId ); // call 'setup', to build the inner array, so we can work on the structure using the // given methods $tree->setup(); dumpAllNicely('dump all after creation'); // get the path of the last inserted element dumpHelper('$tree->getPath( '.$id.' )' , 'dump the path from "myElement/anotherSubElement"'); print "tree->getIdByPath('myElement/subElement')=".$id = $tree->getIdByPath('myElement/subElement'); dumpHelper('$tree->getParent('.$id.')' , 'dump the parent of "myElement/subElement"' , true); // you can also use: $tree->data[$id]['parent'] $id = $tree->getIdByPath('myElement'); dumpHelper('$tree->getChild('.$id.')' , 'dump the child of "myElement"' , true); // you can also use: $tree->data[$id]['child'] $id = $tree->getIdByPath('myElement'); dumpHelper('$tree->getChildren('.$id.')' , 'dump the children of "myElement"'); // you can also use: $tree->data[$id]['children'] $id = $tree->getIdByPath('myElement/subElement'); dumpHelper('$tree->getNext('.$id.')' , 'dump the "next" of "myElement/subElement"' , true); // you can also use: $tree->data[$id]['next'] $id = $tree->getIdByPath('myElement/anotherSubElement'); dumpHelper('$tree->getPrevious('.$id.')' , 'dump the "previous" of "myElement/anotherSubElement"' , true); // you can also use: $tree->data[$id]['previous'] $id = $tree->getIdByPath('myElement'); $element = $tree->data[$id]['child']['next']['parent']; // refer to yourself again, in a very complicated way :-) dumpHelper('$element[\'id\']' , 'demo of using the internal array, for referencing tree-nodes, see the code'); $id = $tree->getIdByPath('myElement'); $element = $tree->data[$id]['child']['next']; // refer to the second child of 'myElement' dumpHelper('$element[\'id\']' , 'demo2 of using the internal array, for referencing tree-nodes, see the code'); $id = $tree->getIdByPath('myElement/anotherSubElement'); $tree->move($id , 0); $tree->setup(); // rebuild the structure again, since we had changed it dumpAllNicely( 'dump all, after "myElement/anotherSubElement" was moved under the root' ); $moveId = $tree->getIdByPath('myElement'); $id = $tree->getIdByPath('anotherSubElement'); $tree->move( $moveId , $id ); $tree->setup(); // rebuild the structure again, since we had changed it dumpAllNicely('dump all, after "myElement" was moved under the "anotherSubElement"'); $tree->setRemoveRecursively(true); $tree->remove(0); echo '<font color="red">ALL ELEMENTS HAVE BEEN REMOVED (uncomment this part to keep them in the DB after running this test script)</font>'; ?>
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