How to recursively delete a node and all nodes under that node
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The copy code is as follows:
/ *
* modify a piece of department information
, /
Function del ($bumen_id) {
$sql= "select bumen_id from lxsm_bumen where topbumen_id=". $bumen_id; / / query bumen_id with topbumen_id as $bumen_id
$delsql= "delete from lxsm_bumen where bumen_id=". $bumen_id; / / Delete department information whose bumen_id is $bumen_id
$xiaji_id=$this- > DB- > fetch_assoc ($sql)
If ($xiaji_id) {
Foreach ($xiaji_id as $id) {
$res=$this- > del ($id [bumen _ id])
}
}
$result=$this- > DB- > query ($delsql)
If ($result) {
Return true
}
Else {
Return false
}
}
Note: the topbumen_id here is the id number of the superior department in the department information, and the fetch_assoc () function is an encapsulated function that returns all the contents of the query into an array.
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