Call Curl inside while

Question

I’m trying to file a requisition cURL for each line returned by a query in a database. The problem is that my program dies right after the first call cURL, and I have no idea why.

Searching the internet, I saw that the ideal would be to separate the call cURL in a function outside the while, but that did nothing. Simplifying a lot of my code, that’s what I have so far:

<?php 
    include_once('config.php');
    ini_set('max_execution_time', 0);
    header('Content-Type: application/json');

    $stmt = $connection->prepare("SELECT * FROM tabela");

    $array = array();
    if($stmt->execute()) {
        while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
            $retorno = callCurl($row["info"]);

            $sql = "UPDATE tabela SET coluna1 = ?, coluna2 = ? WHERE id = ?";
            $stmt = $connection->prepare($sql);
            $stmt->execute(array($retorno["lat"], $retorno["lng"], $row["id"]));

            array_push($array, $retorno);
        }
    }

    echo json_encode($array);

    function callCurl($info) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,'meulink.com.br/script.php?param=' . $info);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        $retorno = json_decode(curl_exec($ch), TRUE);
        curl_close($ch);

        return $retorno;
    }
?>

My suspicion is that the curl_init is breaking in the second while iteration, but I have no idea why. Even trying to use curl_error nothing is returned, the program only dies.