PHP Unlimited classification, support cache classification tree

This is the Category List page in the background management

Contains infinite categories

Include ROOT. ' include/tree.class.php ';

declaring infinite categories

$tree = new Tree ();

Set Cache Directory

$tree->cdir = ROOT. ' cache/class/';

Read into the category cache

$tree->getcache (' class ');

Get Cache

$rootArray = $tree->nodes; Classification information is sorted in order before it is written to the cache, and can be directly output without the need to generate a classification tree again
Copy code//You need to regenerate the taxonomy tree only if you are modifying a taxonomy table in the database

Contains infinite categories

Include ROOT. ' include/tree.class.php ';

declaring infinite categories

$tree = new Tree ();

Set Cache Directory

$tree->cdir = ROOT. ' cache/class/';

Query the database, return the category ID, name, parent Class 3 fields

$db->select (' All ', ' class ', ' id,name,parent ');

Traverse the result set and press into the infinite category

while ($row = $db->record (' All '))

{

$tree->newnode ($row [' id '], $row [' Name '], (int) $row [' parent ']); The parent class ID needs to be a number

}

Generate the taxonomy tree and write to the cache

$tree->putcache (' class ');
Copy code//Another simpler way to override caching, which is to delete the

Contains infinite categories

Include ROOT. ' include/tree.class.php ';

declaring infinite categories

$tree = new Tree ();

Set Cache Directory

$tree->cdir = ROOT. ' cache/class/';

Read into the category cache

$tree->getcache (' class ');

Whether the taxonomy exists

if (Isset ($tree->nodes[$id]))

{

Generate query criteria

$condition = ' id= '. $id;

Gets the subcategory ID of the taxonomy

$childsId = $tree->getchildsid ($id); If a subcategory exists, the modified method returns a one-dimensional array with values of the IDs for each subcategory, or False if no subcategories exist

If a subcategory exists

if ($childsId)

{

If the subcategory exists, it is deleted along with the sub category

foreach ($childsId as $childId)

{

$condition. = ' or id= '. $childId; To generate a delete condition

Unload an entry in an infinite category

unset ($tree->nodes[$childId]); Delete the category information of the corresponding ID in the classification tree directly

}

}

Start deletion

$db->delete (' class ', $condition);

Delete the category entry in the infinite category

unset ($tree->nodes[$id]);

overriding an infinite category cache

$tree->putcache (' class ');

Output Deletion Success token

Exit (' OK ');

} else {

Output error message if not present

Exit (' This category does not exist! ');

}
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