How does PHP get the ID number of all the children and grandchildren of the column?

This article mainly introduces "how to get the ID number of all the children and grandchildren of the column by PHP". In the daily operation, I believe many people have doubts about how to obtain the ID number of all the children and grandchildren of the column. The editor has consulted all kinds of materials and sorted out a simple and useful method of operation. I hope it will be helpful for you to answer the doubt of "how to get the ID number of all the children and grandchildren of the column"! Next, please follow the editor to study!

The copy code is as follows:

/ / @ get the sub-column ID number

Private function sonCategoryIds ($categoryID)

{

/ / @ initialize column array

$array [] = $categoryID

Do

{

$ids =''

$temp = $this- > mysql- > select ('SELECT `id` FROM `pcb_article_ roomy` WHERE `parentID` IN ('. $categoryID. ')')

Foreach ($temp as $v)

{

$array [] = $v ['id']

Ids. =','. $v ['id']

}

$ids = substr ($ids, 1, strlen ($ids))

$categoryID = $ids

}

While (! empty ($temp))

$ids = implode (',', $array)

Return $ids

}

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