Show 'Google Books` items with PHP - php

Question

I'm studying a way to use the Google Books API.
Using this code have the expected result.
$page = file_get_contents("https://www.googleapis.com/books/v1/volumes?q=julio+verne&maxResults=40");
$data = json_decode($page, true);
for($a = 0 ; $a <= 39 ; $a++) {
$img = $data['items'][$a]['volumeInfo']['imageLinks']['thumbnail'];
print '<img src="'.$img.'" alt="ScanLine"/>';
echo '<br>';
echo "Title = " . $data['items'][$a]['volumeInfo']['title'];
echo '<br>';
echo "Authors = " . #implode(",", $data['items'][$a]['volumeInfo']['authors']);
echo '<br>';
echo "Editora = " . $data['items'][$a]['volumeInfo']['publisher'];
echo '<br>';
echo "id = " . $data['items'][$a]['id'];
echo '<br>';
echo "Resumo = ";
echo "<p>" . $data['items'][$a]['volumeInfo']['description'];
echo '</p><br>';
}
On the other hand, implementing and using the code form the code does not work.
My page with form have this code:
<form action="action.php" method="POST">
<div class="form-group">
<div class="campos">
<label>
Search
</label>
<input type="text" name="search" style="margin-right: 10px; width:250px; float:left" class="input-field" placeholder="Title, Author..." />
<input type=hidden name=numResults value="&maxResults=40">
<button type="submit" id="search" class="btn btn-default">Search</button>
</div>
</div>
</form>
And my action have this code:
$var1 = "https://www.googleapis.com/books/v1/volumes?q=";
$var2 = urlencode($_POST['search']);
$var3 = "&maxResults=40";
$str = str_replace(" ", "+", $var2);
$page = $var1.$str.$var3;
$data = json_decode($page, true);
echo $page;
echo '<br>';
for($a = 0 ; $a <= 39 ; $a++) {
$img = $data['items'][$a]['volumeInfo']['imageLinks']['thumbnail'];
print '<img src="'.$img.'" alt="ScanLine"/>';
echo '<br>';
echo "Title = " . $data['items'][$a]['volumeInfo']['title'];
echo '<br>';
echo "Authors = " . #implode(",", $data['items'][$a]['volumeInfo']['authors']);
echo '<br>';
echo "Editora = " . $data['items'][$a]['volumeInfo']['publisher'];
echo '<br>';
echo "Resumo = ";
echo "<p>" . $data['items'][$a]['volumeInfo']['description'];
echo '</p><br>';
}
What must be wrong?
Any advise?
Thanks from Brazil

Answer 1

You are not calling file_get_contents() in the second example. So $page is just the url.
$page = file_get_contents($var1.$str.$var3);