Get child of child recursively php - php

Question

i have a table with two columns id and parent id
I want to get a recursive result child of child of child and so on
here in this example i want to achieve a result like
parent_id = 2
means first time parent is 2
next time result will be as parent
like 4,5,6,15 was id and 2 is parent id
next time 4,5,6,15 will be used as parent id
and result will be id = 7,8,13,14,16 and their id = 4,5,6 and 15
this will continue until last child.

Answer 1

maybe it can help you
<?php
$serverName = "localhost"; //serverName\instanceName
// Since UID and PWD are not specified in the $connectionInfo array,
// The connection will be attempted using Windows Authentication.
$connectionInfo = array( "Database"=>"jdih");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn ) {
echo "Connection established.<br />";
}else{
echo "Connection could not be established.<br />";
die( print_r( sqlsrv_errors(), true));
}
function count_data($var)
{
$serverName = "localhost";
$connectionInfo = array( "Database"=>"jdih");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
$sql = "SELECT count(*) total from test where parent_id = '".$var."'";
$stmt = sqlsrv_query( $conn, $sql );
$rowChild = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_ASSOC);
return $rowChild['total'];
}
$sql = "SELECT id from test where parent_id = 0";
$stmt = sqlsrv_query( $conn, $sql );
if( $stmt === false) {
die( print_r( sqlsrv_errors(), true) );
}
while( $row = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_ASSOC) ) {
$totalchild = count_data($row['id']);
if($totalchild > 0){
$sqlchild = "select id from test where parent_id = '".$row['id']."'";
$stmtchild = sqlsrv_query( $conn, $sqlchild);
while( $rowChild = sqlsrv_fetch_array( $stmtchild, SQLSRV_FETCH_ASSOC) ){
//
$totalchild2 = count_data($rowChild['id']);
if($totalchild2 > 0){
$sqlchild2 = "select id from test where parent_id = '".$rowChild['id']."'";
$stmtchild2 = sqlsrv_query( $conn, $sqlchild2);
while( $rowChild2 = sqlsrv_fetch_array( $stmtchild2, SQLSRV_FETCH_ASSOC) ){
echo $row['id']. ' Has ' . $rowChild['id'].' has '.$rowChild2['id']. '<br>';
}
}else{
echo $row['id']. ' Has ' . $rowChild['id'].'<br>';
}
}
}else{
echo $row['id']. ' Has nothing';
}
}
?>
here is an example,i'm using sql. It's not dynamic but if only two level maybe it will help. You can add conditional check if that has child.
sorry bad english