如何使用PHP中的ID数组从mysql表中删除多行

Question

I'm having trouble using an array to make an sql query delete multiple rows of data at once. Please ignore that I'm using sql injection for now.

EDIT: A somewhat better explanation - my php does not work at all. I have edited it somewhat, after checking the link Sebastian provided in the comments

NOTE: I'm using AngularJS to post

This is my $data structure, from my controller.js function. devicesToDelete is just a simple array, eg ["1", "2", "3"]:

$http.post('./js/removeMultiple.php', { 'devicesToDeleteArray': devicesToDelete })
     .success(function(data) {
          $scope.results = data;
          devicesToDelete = [];
     })
     .error(function(err) {
         $log.error(err);
     })

This is the updated php code im having trouble with. On clicking my deleteMultiple button, only the confirm alert fires, the selected items aren't deleted and the console is clear of errors:

<?php

$data = json_decode(file_get_contents("php://input"));

include('config.php');

$sql = "DELETE FROM devices WHERE devID in ( implode(",", $data) )";

$qry = $conn->query($sql);

$sql = "SELECT * FROM devices";

$qry = $conn->query($sql);

$data = array();

if($qry->num_rows > 0){
    while($row = $qry->fetch_object()){
        $data[] = $row;
    }
}else {
    $data[] = null;
}




$conn->close();

echo json_encode($data);

EDIT 2: I managed to solve the issue on my own. Here is the solution:

I used .join() on my array on the javascript side to have all of the IDs for deletion be separated by commas (eg 1, 2, 3):

$http.post('./js/removeMultiple.php', { 'devicesToDeleteArray': devicesToDelete.join(", ") })
                    .success(function(data) {
                        $scope.results = data;
                        devicesToDelete = [];
                    })
                    .error(function(err) {
                        $log.error(err);
                    })

Then I just added what I completely glanced over in my php code which is the name of the array i was passing into it - devicesToDeleteArray

<?php

$data = json_decode(file_get_contents("php://input"));

include('config.php');

$sql = "DELETE FROM devices WHERE devID in ($data->devicesToDeleteArray)";

$qry = $conn->query($sql);

$sql = "SELECT * FROM devices";

$qry = $conn->query($sql);

$data = array();

if($qry->num_rows > 0){
    while($row = $qry->fetch_object()){
        $data[] = $row;
    }
}else {
    $data[] = null;
}

$conn->close();

echo json_encode($data);

Answer 1

here is php code:

<?php
$ids = $_POST['devicesToDeleteArray'];
if(!is_array($data)) {
   $ids = json_decode($data, true);
}
if(!empty($ids)) {
include 'config.php';

$sql  = "DELETE FROM devices WHERE devID in (implode(",", $ids))";
$qry  = $conn->query($sql);
$sql  = "SELECT * FROM devices";
$qry  = $conn->query($sql);
$data = array();
if ($qry->num_rows > 0) {
    while ($row = $qry->fetch_object()) {
        $data[] = $row;
    }
} else {
    $data[] = null;
}
$conn->close();
echo json_encode($data);