Curl progress function in PHP - php

Question

I am wondering why this download() function is not working.
function download($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, 'progress');
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
$html = curl_exec($ch);
curl_close($ch);
function progress($resource, $download_size, $downloaded, $upload_size, $uploaded)
{
if ($download_size > 0)
$progress = round($downloaded / $download_size * 100);
$progress = array('progress' => $progress);
$path = "temp/";
$destination = $path."11.json";
$file = fopen($destination, "w+");
fwrite($file, json_encode($progress, JSON_UNESCAPED_UNICODE));
fclose($file);
}
}
download("http://stackoverflow.com");
But when I am using without function like
curl_setopt($ch, CURLOPT_URL, "http://stackoverflow.com");
or when I am using the function twice like
download("http://stackoverflow.com");
download("http://stackoverflow.com");
it works. Otherwise it doesn't create any json file.

Answer 1

Declare your function progress outside of download:
function download($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, 'progress');
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
$html = curl_exec($ch);
curl_close($ch);
}
function progress($resource, $download_size, $downloaded, $upload_size, $uploaded)
{
if ($download_size > 0)
$progress = round($downloaded / $download_size * 100);
$progress = array('progress' => $progress);
$path = "temp/";
$destination = $path."11.json";
$file = fopen($destination, "w+");
fwrite($file, json_encode($progress, JSON_UNESCAPED_UNICODE));
fclose($file);
}