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AJAX form with e.preventDefault(); redirects to the PHP file

When I click the button to submit the form it sends me to the PHP file (Php/modify-recipes.php). I'm using AJAX with e.preventDefault();, but it doesn't seem to work. I have a similar form on my other page and it works fine. This one is a little bit different, the form is generated from another PHP file (it takes values from the database).
// AJAX (in HTML head tag)
<script>
$(function () {
$("#search-form").on('click', 'p.product', function(e){
var product = $(this).attr('id');
e.preventDefault();
$.ajax({
type: "post",
url: 'Php/display-modify-recipes.php',
data: { "id": product },
success: function(response) {
$(".modify-recipes").html(response);
$(".search-results").html("");
}
});
}
)});
$(function () {
$('#add_recipes_form').on('click', '#add', function (e) {
e.preventDefault();
let sendForm = true;
$('.required').each(function(){
if ($(this).val() == ''){
$(this).addClass('error', 4000);
$('#placeholder-text').html("Fill in the form");
$('#placeholder-text').addClass('error');
$('#add').addClass('error', 4000);
sendForm = false;
} else {
$(this).removeClass('error');
$('#placeholder-text').removeClass('error');
$('#add').removeClass('error');
}
})
$('.required2').each(function(){
if ($(this).val() == ''){
$('#placeholder-text').html("Fill in the form");
$('#placeholder-text').addClass('error');
$('#add').addClass('error');
$('#file_style').addClass('error');
sendForm = false;
} else {
$('#file_style').removeClass('error');
$('#placeholder-text').removeClass('error');
$('#add').removeClass('error');
}
})
if (sendForm) {
$.ajax({
type: "post",
url: 'Php/modify-recipes.php',
data: new FormData(this),
processData: false,
contentType: false,
success: function () {
},
error: function () {
}
});
}
});
});
</script>
// HTML
<form method="POST" enctype='multipart/form-data' id="search-form" class="aaa">
<input type="text" name="search-bar" class="search-bar" placeholder="Search">
<div class="search-results"></div>
</form>
<div class="modify-recipes"></div>
// Php/display-modify-recipes.php
<?php
function display_mod_form(){
$con = mysqli_connect("localhost", "root", "", "cookbook");
$product = $_POST["id"];
$sql = "SELECT * FROM product WHERE id = '$product'";
$res = mysqli_query($con,$sql);
while($row = mysqli_fetch_assoc($res)) {
$id = $row['id'];
$name = $row['name'];
$description = $row['description'];
$type = $row['type'];
$difficulty = $row['difficulty'];
$image = $row['image'];
?>
<form method="POST" action="Php/modify-recipes.php" enctype="multipart/form-data" id="add_recipes_form" class="add-form">
<input type="text" name="id" id="<?php echo $id ?>" value="<?php echo $id ?>" style="display:none;">
<label for="name">Name</label>
<input type="text" name="name" id="name" class="required" maxlength="28" value='<?php echo $name ?>'>
<label for="description">Desc.</label>
<input type="text" name="description" id="description" class="required" maxlength="128" value='<?php echo $description ?>'>
<label for="type">Type</label>
<select name="type" class="required">
<option value="dishes" <?php if($type == 'dishes') {echo "selected=selected"; } ?>>
Dishes
</option>
<option value="desserts" <?php if($type == 'desserts') {echo "selected=selected"; } ?>>
Desserts
</option>
<option value="snacks" <?php if($type == 'snacks') {echo "selected=selected"; } ?>>
Snacks
</option>
<option value="other" <?php if($type == 'other') {echo "selected=selected"; } ?>>
Other
</option>
</select>
<label for="difficulty">Difficulty</label>
<select name="difficulty" class="required">
<option value="easy" <?php if($difficulty == 'easy') {echo "selected=selected"; } ?>>
Ease
</option>
<option value="moderate" <?php if($difficulty == 'moderate') {echo "selected=selected"; } ?>>
Moderate
</option>
<option value="hard" <?php if($difficulty == 'hard') {echo "selected=selected"; } ?>>
Hard
</option>
</select>
<label for="image">Image (jpg, png)</label>
<label for="upload_image" id="file_style">Choose image</label>
<input type="file" style="display:none;" id="upload_image" name="image" accept="image/*" onchange="loadFile(event)" class="required2">
<div class="send-btn">
<p id="placeholder-text"></p>
<input type="submit" name="add" id="add" value="Send">
<div class="send-block"></div>
</div>
</form>
<?php
}
mysqli_close($con);
}
display_mod_form();
?>
// Php/modify-recipes.php
<?php
$con = mysqli_connect("localhost", "root", "", "cookbook");
$id = $_POST["id"];
$name = $_POST["name"];
$description = $_POST["description"];
$type = $_POST["type"];
$difficulty = $_POST["difficulty"];
if ($_FILES['image']['name'] == ""){
$sql_var = "SELECT image FROM product where id = '$id'";
$var = mysqli_query($con,$sql_var);
while($row = mysqli_fetch_assoc($var)) {
$image = $row['image'];
}
} else {
$image = $_FILES['image']['name'];
}
$sql = "
UPDATE product SET
name = '$name',
description = '$description',
type = '$type',
difficulty = '$difficulty',
image = '$image',
last_mod_date = '$mod_date'
WHERE id = '$id';
";
$target = "../Uploads/".basename($image);
if (move_uploaded_file($_FILES['image']['tmp_name'], $target)) {
}
$var = mysqli_multi_query($con,$sql); <!-- There are more queries -->
mysqli_close($con);
?>
(Sorry for any mistakes, it's a shortened version)
There is a third ajax function and PHP file, but it's not important (simple search bar). I tried other things like action="", no action at all, etc., but it didn't work.
How to fix this?
Edit: There is only one form (when you click on p.product it displays the form according to the data in the database). The problem occurs ONLY when I'm submitting the "add_recipes_form", there is no problem with the search box. Please don't mark this question as a duplicate of a 10 year old post that is irrelevant to my problem.

Opening a .html with window.location

I'm writing a simple login page in Ajax + Jquery
I have an error when I click on the button. And I don't understand why.
Uncaught SyntaxError: Unexpected end of input
At this line
echo '<input type="button" value="connexion" OnClick="window.location.assign("http://localhost/loginmap/members/success.html")>';
There is my code
<?php
session_start();
//si le user a un session de ouverte
/*if(isset($_SESSION['connecté'])){
header('Location : success.html');
die();
}*/
if (isset($_POST['login'])) {
$connection = new mysqli('localhost','root','','monumap');
$email = $connection->real_escape_string($_POST['emailPHP']);
$password = $connection->real_escape_string($_POST['passwordPHP']);
$data = $connection->query("SELECT id FROM users WHERE email = '$email' AND password = '$password'");
if($data->num_rows >= 0) {//tout et ok -> connexion
$_SESSION['connecté'] = '1';
//$_SESSION['email'] = $email;
header('Location:'.$_SESSION['redirectURL']);
exit('<font color = "green">Connexion reussi...</font>');
}else{
exit('<font color = "red">Le Mot de passe / Email est inconnue </font>');
}
//exit($email . " = " . $password);
}
?>
<html>
<head>
<title>Monumap Connexion</title>
</head>
<body>
<form method="post" action="login.php">
<input type="text" id="email" placeholder="Email..."><br>
<input type="password" id="password" placeholder="Mot de passe..."><br>
<input type="submit" value="Log In" id="login">
</form>
<p id = "reponse"></p>
<div class="Bouton">
<?php if($_SESSION['connecté']==1){
echo '<input type="button" value="connexion" OnClick="window.location.assign("http://localhost/loginmap/members/success.html")>';
}
?>
</div>
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#login").on('click', function () {
var email = $("#email").val();
var password = $("#password").val();
if (email == "" || password == "")
alert('vos inputs sont vides');
else {
$.ajax(
{
url: 'login.php',
method: 'POST',
data: {
login: 1,
emailPHP: email,
passwordPHP: password
},
success: function (reponse) {
$("#reponse").html(reponse);
},
dataType: 'text'
}
);
}
});
});
</script>
</body>
</html>

echo '<input type="button" value="connexion" onclick="window.location.assign('."'http://localhost/loginmap/members/success.html'".');")/>';
It's cause you wrote quote character.
You can use this way as well.
echo '<input type="button" value="connexion" onclick="func()"/>';
?>
<script>
function func(){
window.location.assign("http://localhost/loginmap/members/success.html");
}
</script>

Strange behaviour of my javascript

Sorry for the vague title, but this behaviour is pretty hard to explain.
I have a form where I enter some information. When the user click the submit button (values "programma"), I call a javascript. I check that the info are correct and use AJAX to add a record in my local database. The strange behaviour is the following:
I fill up the form. The record doesn't exist in my DB. Everything works correctly and my record is inserted. Success: I write in the span tag "Esecuzione registrata correttamente!"
Then I try to insert the same record. Since it exists in my DB, the error gets notified correctly in my span: "Esiste un condannato con gli stessi dati"
At this point my form is still full of text, if the user want to correct his mistake and insert a non-existing record. What happens is that, when I change some input (and I'm sure that record doesn't exist in my DB) and click the submit button, literally nothing happens. I still see my error message "Esiste un condannato con gli stessi dati", even if I saw in my console that my AJAX worked correctly
programma.php (what you see in my screenshot)
<?php
session_start();
if(!isset($_SESSION["nickname"]) && !isset($_SESSION["password"]) ) {
header("location: index.php");
exit();
}
else
{
echo "<p> Sessione di ".$_SESSION["nickname"]." con password ".$_SESSION["password"]." </p>";
}
?>
<!DOCTYPE html>
<html lang="it">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="programma.css">
<style type="text/css">
.container {
width: 500px;
clear: both;
}
.container text {
width: 100%;
clear: both;
}
</style>
<title>RIPconvicts - Programma esecuzione</title>
</head>
<body>
<?php require 'snippets/menu.php'; ?>
<form>
<fieldset class="centered">
<legend>Programma nuova esecuzione</legend>
<label for="nome"> Nome* </label> <br>
<input type="text" name="nome" id="nome"> <br> <br>
<label for="cognome"> Cognome* </label> <br>
<input type="text" name="cognome" id="cognome"> <br> <br>
<label for="classe"> Classe* </label> <br>
<input type="text" name="classe" id="classe"> <br> <br>
<label for="materia"> Materia* </label> <br>
<input type="text" name="materia" id="materia"> <br> <br>
<label for="data">Data* </label> <br>
<input type="date" name="data" id="data"> <br> <br>
Note <br>
<textarea name="note" id="note" rows="6" cols="50"> </textarea> <br> <br>
<span id="avviso" style="color:red"></span> <br>
<input type="button" onclick="programma_esecuzione()" value="Programma">
</fieldset>
</form>
<?php require 'snippets/footer.php'; ?>
<script>
function programma_esecuzione() {
// Verifica che tutti i campi necessari siano stati riempiti
document.getElementById("avviso").innerHTML = "";
var nomi = ["nome", "cognome", "classe", "materia"];
var campi_mancanti = "";
for(var i=0; i<nomi.length-1; i++) {
if(document.getElementById(nomi[i]).value == "") {
campi_mancanti+=" "+nomi[i];
}
}
if(!Date.parse( document.getElementById("data").value )) {
campi_mancanti+=" data";
}
// Se ci sono campi mancanti, ritorna alla pagina principale
if(campi_mancanti!="") {
window.alert("Riempire i seguenti campi mancanti:"+campi_mancanti);
return;
}
// Se tutti i campi necessari ci sono, allora è possibile richiedere l'aggiunta del record
var xhttp;
xhttp = new XMLHttpRequest();
var nome = document.getElementById("nome").value;
var cognome = document.getElementById("cognome").value;
var classe = document.getElementById("classe").value;
var materia = document.getElementById("materia").value;
var data = document.getElementById("data").value;
var note = document.getElementById("note").value;
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var risposta = this.responseText;
if(risposta.indexOf("Esecuzione registrata correttamente!") > -1) {
// Svuota tutti i campi
document.getElementById("nome").value = "";
document.getElementById("cognome").value = "";
document.getElementById("classe").value = "";
document.getElementById("materia").value = "";
document.getElementById("data").value = "";
document.getElementById("note").value = "";
}
document.getElementById("avviso").innerHTML = risposta;
}
};
xhttp.open("POST", "./snippets/programma_esecuzione.php", false);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send("nome="+nome+"&cognome="+cognome+"&classe="+classe+"&materia="+materia+"&data="+data+"&note="+note);
}
</script>
</body>
</html>
programma_esecuzione.php (where I execute my query)
<?php
//Include
require 'connetti_a_DB.php';
// Variabili per il login
$nome = $_POST["nome"];
$cognome = $_POST["cognome"];
$classe = $_POST["classe"];
$materia = $_POST["materia"];
$data = $_POST["data"];
$note = $_POST["note"];
/*echo $nome."<br>";
echo $cognome."<br>";
echo $classe."<br>";
echo $materia."<br>";
echo $data."<br>";
echo $note."<br>";*/
// Inizia una sessione
session_start();
$username = $_SESSION["nickname"];
$password = $_SESSION["password"];
// Stabilire e chiudere connessione
$conn = connetti_a_DB($username, $password);
// Verifica se c'è un record "clone"
$nome_completo = $nome." ".$cognome;
$sql = " SELECT *
FROM `lista`
WHERE `NOME_COMPLETO`='$nome_completo' OR
`CLASSE`='$classe' OR
`MATERIA` ='$materia' OR
`DATA` ='$data'";
$result = $conn->query($sql);
if($result->num_rows > 0) {
echo 'Esiste un condannato con gli stessi dati';
}
else
{
$sql = "INSERT INTO `ripconvicts`.`lista` (`ID`, `NOME_COMPLETO`, `CLASSE`, `MATERIA`, `DATA`, `NOTE`)
VALUES (NULL, '$nome_completo', '$classe', '$materia', '$data', '$note')";
$result = $conn->query($sql);
echo "Esecuzione registrata correttamente!";
}
$conn->close();
// Salta alla pagina iniziale
//header("location: ../programma.php");
//exit();
?>

javascript form validation with multiple field and display on site

So, hey, I know that there's more than someone could want of this type of question, but maybe I can present it with a little twist, i have try to mix different thing reader here and there, but when i submit the form the validation process don't run and it just submit directly the form. It's a one go script, and it go like this:
<script type="text/javascript">
var errors =[];
function printarray(array){
for (var i=0; i<array.lenght; i++){
document.write(array[i]);
}
}
function validate(){
document.getElementById("npostform").elements["contenidotext"].value=window.frames["contenido"].document.body.innerHTML;
document.getElementById("npostform").elements["resumentext"].value=window.frames["resumen"].document.body.innerHTML;
if (document.npostform.titulo.value=="" || document.npostform.titulo.value==null){
errors.push("Se debe especificar un titulo <br>");
}
if (document.npostform.contenidotext.value=="" || document.npostform.contenidotext.value==null){
errors.push("Se debe incluir un contenido <br>");
}
if (document.npostform.resumentext.value=="" || document.npostform.resumentext.value==null){
errors.push("Se debe incluir un resumen <br>");
}
if(errors.length >0){
for (var i=0; i<errors.lenght; i++){
document.getElementById("error").innerHTML=printarray(errors);
}
return false;
}else{
return true;
}
}
</script>
<div id="error"></div>
<form action="entradas.php" name="npostform" id="npostform" method="post" enctype="multipart/form-data" onsubmit="return validate();">
<label for="Titulo">Titulo:</label>
<input type="text" name="titulo" value="<?php if (isset($_SESSION['titulo'])) { echo $_SESSION['titulo'];} ?>">
<br>
<label for="Categoria">Categoria-Seccion:</label>
<select name="categoria" value= "<?php if(isset($_SESSION['categoria'])){echo $_SESSION['categoria'];} ?>">
<option value=""></option>
<?php
foreach (tomarcategorias() as $order =>$categorias){
$name = $categorias['name'];
$id = $categorias['id'];
$order =$categorias['order'];
if ($categorias['type'] == 'Articulos'){
echo "<optgroup label='", $name, "'>";
foreach(tomarsecciones('idcategoria', $id) as $ord => $secciones){
$ord = $secciones['order'];
echo "<option value='", $secciones['id'], "'><PRE>", $secciones['name'], "</option>";
}
}
}
?>
</select>
<br>
<textarea name="contenidotext" rows="15" cols="50" style="display:none;"></textarea>
<iframe name="contenido" id="contenido" style="width:300; height:100; background: white;"></iframe>
<br>
<label>Resumen del articulo</label>
<br>
<textarea name="resumentext" rows="5" cols="50" style="display:none;"></textarea>
<iframe name="resumen" id="resumen" style="background: white;"><?php if (isset($_SESSION['resumen'])) { echo $_SESSION['resumen'];}?></iframe>
<br>
<input type="submit" name="add_post" value="Subir post"/>
</form>
I have to be sincere, in the head there is a linked javascript but that contain functions for buttons for a simple wysiwyg and already try to make all the script together, in the same and different files, didn't change a thing.
Does anybody know where the bug is? and also,is there a way to view the errors of javascript script as in php?

Codeigniter ajax request fail on output

I'm trying to make an ajax request with jquery/codeigniter. Well, there seems to be a problem. i do get it to work, but it seems like the POST is not sent, for some reason...
Javascript
$('#profileUpdateButton').click(function() {
$.ajax({ // Starter Ajax Call
method: "POST",
url: baseurl + 'profile/statusUpdate',
data: $('#statusUpdateForm').serialize(),
success: function(data) {
alert(data);
}
});
return false;
});
From the codeigniter controller
if($this->input->is_ajax_request()) {
echo $this->input->post('profileUpdate');
}
If i replace the "echo $this->" etc.. with just echo "Hello" i do get an alertbox with "Hello", why don't i get the text from the box?
html
<div id="statusUpdate">
<?php echo form_open(base_url() . 'profile/statusUpdate', array('name' => 'statusUpdateForm')); ?>
<input type="text" value="Hva tenker du på?" name="profileUpdate" id="profileUpdate" onfocus="if(this.value == 'Hva tenker du på?')this.value=''" onblur="if(this.value == '')this.value='Hva tenker du på?'" />
<input type="submit" value="" name="profileUpdateButton" id="profileUpdateButton" />
<?php echo form_close(); ?>
</div>

Change your html markup to this...
<div id="statusUpdate"> <!-- Use ID not NAME here |v| -->
<?php echo form_open(base_url() . 'profile/statusUpdate', array('id' => 'statusUpdateForm')); ?>
<input type="text" value="Hva tenker du på?" name="profileUpdate" id="profileUpdate" onfocus="if(this.value == 'Hva tenker du på?')this.value=''" onblur="if(this.value == '')this.value='Hva tenker du på?'" />
<input type="submit" value="" name="profileUpdateButton" id="profileUpdateButton" />
<?php echo form_close(); ?>
</div>
you were setting the form's name and you were selecting $('#statusUpdateForm') which means the id of statusUpdateForm, not the name attribute...