Downloading website screenshot not downloading right size - php

Question

Hello this is a 2 part question....
I have been trying to solve my problem for a while and gave up tonight and seeking answers :/
i have the following code and trying to download the image to the width of 1207px,
the download of the script works fine so i haven't included it below.
the second part is i like to screenshot to the ratio of 1207px wide but cant find way round it.
i have edited the following lines..
$w = 500;
$h = 768;
but this don't work, what ever the values are it downloads at 500px or very close width which is not ideal.
$url = trim(urldecode($url));
if ($url == '') {
exit();
}
if (!stristr($url, 'http://') and !stristr($url, 'https://')) {
$url = 'http://' . $url;
}
$url_segs = parse_url($url);
if (!isset($url_segs['host'])) {
exit();
}
$here = dirname(__FILE__) . DIRECTORY_SEPARATOR;
$bin_files = $here . 'bin' . DIRECTORY_SEPARATOR;
$jobs = $here . 'jobs' . DIRECTORY_SEPARATOR;
$cache = $here . 'cache' . DIRECTORY_SEPARATOR;
if (!is_dir($jobs)) {
mkdir($jobs);
file_put_contents($jobs . 'index.php', '<?php exit(); ?>');
}
if (!is_dir($cache)) {
mkdir($cache);
file_put_contents($cache . 'index.php', '<?php exit(); ?>');
}
$w = 500;
$h = 768;
if (isset($_REQUEST['w'])) {
$w = intval($_REQUEST['w']);
}
if (isset($_REQUEST['h'])) {
$h = intval($_REQUEST['h']);
}
if (isset($_REQUEST['clipw'])) {
$clipw = intval($_REQUEST['clipw']);
}
if (isset($_REQUEST['cliph'])) {
$cliph = intval($_REQUEST['cliph']);
}
if (isset($_REQUEST['download'])) {
$download = $_REQUEST['download'];
}
$url = strip_tags($url);
$url = str_replace(';', '', $url);
$url = str_replace('"', '', $url);
$url = str_replace('\'', '/', $url);
$url = str_replace('<?', '', $url);
$url = str_replace('<?', '', $url);
$url = str_replace('\077', ' ', $url);
$screen_file = $url_segs['host'] . crc32($url) . '_' . $w . '_' . $h . '.jpg';
$cache_job = $cache . $screen_file;
$refresh = false;
if (is_file($cache_job)) {
$filemtime = #filemtime($cache_job); // returns FALSE if file does not exist
if (!$filemtime or (time() - $filemtime >= $cache_life)) {
$refresh = true;
}
}
$url = escapeshellcmd($url);
if (!is_file($cache_job) or $refresh == true) {
$src = "
var page = require('webpage').create();
page.viewportSize = { width: {$w}, height: {$h} };
";
if (isset($clipw) && isset($cliph)) {
$src .= "page.clipRect = { top: 0, left: 0, width: {$clipw}, height: {$cliph} };";
}
$src .= "
page.open('{$url}', function () {
page.render('{$screen_file}');
phantom.exit();
});
";
$job_file = $jobs . $url_segs['host'] . crc32($src) . '.js';
file_put_contents($job_file, $src);
$exec = $bin_files . 'phantomjs ' . $job_file;
$escaped_command = escapeshellcmd($exec);
exec($escaped_command);
if (is_file($here . $screen_file)) {
rename($here . $screen_file, $cache_job);
}
}
if (is_file($cache_job)) {
if ($download != false) {
$file = $cache_job;
$file_name=basename($file);
$type = 'image/jpeg';
header("Content-disposition: attachment; filename={$file_name}");
header("Content-type: {$type}");
readfile($file);
;
} else {
$file = $cache_job;
$type = 'image/jpeg';
header('Content-Type:' . $type);
header('Content-Length: ' . filesize($file));
readfile($file);
}
}
?>