Filter out the garbage channels, and only show me what I want to see

IPTV M3U filter

<?php 

// download the file
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "<M3U_LINK>");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
curl_close ($ch);

// write to file
$fp = fopen('tv_channels.m3u', 'w');
fwrite($fp, $result);
fclose($fp);

// filter the file
echo "#EXTM3U\n";
exec('grep -E "^#EXTINF.*tvg\-name=\"([^#])*\".*group\-title=\"(NHL|NBA|Canada|USA Entertainment|USA Docs & News|Latino|USA Sports)\"" -A 1 tv_channels.m3u | sed "/^--$/d"', $out);
foreach($out as $line) {
    echo $line."\n";
}

?>