Symfony API Request Unexpected "G" - php

Question

I'm really thrown off by this error I get when posting to Google Books API. The last response in this function is triggered when I post 1781100489 to a form. This form then runs resultAction function. Instead of returning what I want it to, I get a JSON.parse error with an unexpected token in line 1 column 1.
When tested with Postman, it gives me this peculiar message in its response Unexpected 'G'. What could this mean? I have been dumping the variable as you can see, it's commented, but can't understand why this is occuring.
Any clues?
public function findAction(Request $request)
{
$form = $this->createFormBuilder(null, ['csrf_protection' => false])
->add('Title', TextType::class)
->add('Search', SubmitType::class)
->getForm();
$form->handleRequest($request);
if($form->isValid()){
$json = file_get_contents("https://www.googleapis.com/books/v1/volumes?q=".$form->get('Title')->getData());
$response = json_decode($json, true);
if(array_key_exists('items', $response)){
return $this->render('BlogsiteBooksBundle:Pages:results.html.twig', [
'items' => $response['items']
]);
} else {
return new Response('Google did not have any items', 400);
}
}
//var_dump($request);
return new Response('Google Book Not Found', 404);
}

Answer 1

Your request is not related to the form, build the form using Symfony form component in the controller, and manually in the twig, then parameters names does not match. The $form->handleRequest($request); can't find the title, because expect a parameter called form[Title] and you are passing only Title.
Solutions:
1 - Submit manually all given parameters in the query
Change:
$form->handleRequest($request);
For this:
$form->submit($request->query->all());
2 - Change the name of the input to match with symfony expected name and the method used should be POST:
<form action="app_dev.php/find" method="post">
<input type="text" name="form[Title]" id="Title" value="">
<input type="submit" value="Search">
</form>
3 - Render your form using twig form to avoid this problems
Controller:
/**
* #Route(name="find", path="/find")
*/
public function findAction(Request $request)
{
$form = $this->createFormBuilder(null)
->add('Title', TextType::class)
->add('Search', SubmitType::class)
->getForm();
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$json = file_get_contents("https://www.googleapis.com/books/v1/volumes?q=".$form->get('Title')->getData());
$response = json_decode($json, true);
if (array_key_exists('items', $response)) {
return $this->render(
'BlogsiteBooksBundle:Pages:results.html.twig',
[
'items' => $response['items'],
]
);
} else {
$form->addError(new FormError('Google did not have any items'));
}
}
return $this->render('find.html.twig', ['form' => $form->createView()]);
}
View find.html.twig:
{{ form(form) }}
Note: each point is a possible solution, use only one of them, the third is the recommended for simple Symfony forms.

Answer 2

I was dealing with the same error in POSTMAN. I searched for answers but nothing was satisfying my problem.
I find by self that their is a statement "exit();" in my PHP file. I removed it & my problem was solved. I hope my solution help someone.