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- function tree($parent){
- global $con;
- $sql = "select * from category where parentid =$parent";
- $result = $con->query($sql);
- while ($row = $result->fetch_assoc()) {
- echo $row['childid']." ".$row['childname']."<br>";
- tree($row['childid']);
- }
- }
- $tree(select all id where parentid is null)
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