Insert with PHP and AngularJs

If you check for any errors backend you can send the result and display an appropriate message within Angular.

The below php code uses mysqli functions and checks for errors that may arise.

Assuming idMontadora is the primary key of your table and it is auto incrementing, you don't need to include it in the insert query.

I would recommend using output buffering because any notices will dirty the json returned to Angular. See the use of ob_start() at the top of the script, and ob_clean() immediately before the json is echoed.

I have written a little function to handle the echo of the result process_output() to avoid code duplication.

<?php
// start output buffering
ob_start();

// utility function to clean output and echo as json
function process_output($result, $msg)
{
    $out = array('result' => $result, 'msg' => $msg);
    ob_clean();
    echo json_encode($out, JSON_NUMERIC_CHECK);
    exit();
}

$local_server="localhost";
$usuario= "tkc";
$senha="185478";
$banco="garagiextrem";
// setup mysqli
$mysqli = new mysqli($local_server, $usuario, $senha, $banco);
// check connection
if ($mysqli->connect_errno) 
    process_output(0, "Connect failed: ".$mysqli->connect_error);
// define the query
$sql ="INSERT INTO montadora (Nome) VALUES (?)";
// prepare the query
if (!$stmt = $mysqli->prepare($sql)) 
    process_output(0, "Prepare failed: ".$stmt->error);
// bind the parameter
if (!$res = $stmt->bind_param('s', $data->nomeMont))
    process_output(0, "Bind failed: ".$stmt->error);
// execute
if (!$res = $stmt->execute())
    process_output(0, "Execute failed: ".$stmt->error);
// no errors so return true
process_output(1, "Rows inserted: ".$stmt->affected_rows);

In your Angular controller you can then use the result to debug what is happening backend, and also to display an appropriate message to the user, etc.

The below just console logs the data received from the $http.post, but you can extend it to handle the success or error appropriately.

var app= angular.module('garagem', []);
app.controller('montadora',["$scope", "$http", function ($scope, $http) {
    $scope.insertMontadora=function () {
        $http.post("db/insertMont.php", {'nomeMont': $scope.nomeMont}).then(
            function (data,status,headers,config) {
                console.log(data);
            },
            function(data, status, headers, config) {
                console.log(data);
                console.log(status);
            }
        );
    };
}]);

The backend sends the msg which tells you what has happened, and the result key that can be easily used to setup error handling in the controller. Eg. if (data.result === 0) { // handle the error }