cURL POST not submitting the form - php

Question

I'm doing a project and one of the requests is to automatically submit a form to a random site, which is specified from time to time
This is my cURL code :
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url_post);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $dati_post);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
Code to get POST parameters :
foreach ($html->find('form[method=post],form[method=POST]') as $forms_post) {
$n_formPOST++;
$formPOST_action = $forms_post->action;
foreach ($forms_post->find('input') as $input) {
if ($input->type == 'text') {
$dati_testo[$input->name] = "text";
} else if ($input->type == 'email' || $input->name == 'email') {
$dati_random[$input->name] = "emailrandom#gmail.com";
} else if ($input->type == 'hidden') {
$dati_random[$input->name] = $input->value;
} else {
$dati_random[$input->name] = "random";
}
}
foreach ($forms_post->find('textarea') as $textarea) {
if ($textarea->disabled != true) {
$dati_testo[$textarea->name] = "text";
}
}
foreach ($forms_post->find('button') as $bottone) {
if ($bottone->type == 'submit') {
$dati_random[$bottone->name] = "random";
}
}
The problem is that in some sites POST is done correctly and I receive the right answer, which corresponds to the answer I would receive by doing it manually.
On other sites, it seems that the form is not submitted.
I have repeatedly checked the URL that I insert in the cURL and also the data that I pass and if I use them manually it works.
I even tried using online tools that perform POST / GET passing the same URL and the same data that I get in my project and it works.
The url_post is made from url host+form action.
I don't understand if there is something wrong in my curl code, considering I'm pretty sure the data I'm passing to the curl are corrects to complete the POST.
Data :
Site URL : http://www.comune.ricigliano.sa.it/
Form Action : index.php?action=index&p=228
Url_post : http://www.comune.ricigliano.sa.it/index.php?action=index&p=228
POST data :
'qs' => 'something to research'
'Submit2' => 'Cerca'

Answer 1

You need to use the curl_exec() function in order to execute the cURL. It takes the $ch param, like such:
// Execute cURL
curl_exec($ch);
// Close cURL
curl_close($ch);
More info here