PHP Stop Reading Remote Files when after it is Fully Downloaded - php

Question

I'm getting a 30 second timeout error because the code keeps checking if the file is over 5mb when it's under. The code is designed to reject files over 5mb but i need it to also stop executing when the file is under 5mb. Is there a way to check the file transfer chunk to see if it's empty? I'm currently using this example by DaveRandom:
PHP Stop Remote File Download if it Exceeds 5mb
Code by DaveRandom:
$url = 'http://www.spacetelescope.org/static/archives/images/large/heic0601a.jpg';
$file = '../temp/test.jpg';
$limit = 5 * 1024 * 1024; // 5MB
if (!$rfp = fopen($url, 'r')) {
// error, could not open remote file
}
if (!$lfp = fopen($file, 'w')) {
// error, could not open local file
}
// Check the content-length for exceeding the limit
foreach ($http_response_header as $header) {
if (preg_match('/^\s*content-length\s*:\s*(\d+)\s*$/', $header, $matches)) {
if ($matches[1] > $limit) {
// error, file too large
}
}
}
$downloaded = 0;
while ($downloaded < $limit) {
$chunk = fread($rfp, 8192);
fwrite($lfp, $chunk);
$downloaded += strlen($chunk);
}
if ($downloaded > $limit) {
// error, file too large
unlink($file); // delete local data
} else {
// success
}

Answer 1

You should check if you have reached the end of the file:
while (!feof($rfp) && $downloaded < $limit) {
$chunk = fread($rfp, 8192);
fwrite($lfp, $chunk);
$downloaded += strlen($chunk);
}