Fatal error: Out of memory PHP - php

Question

I am not sure why this was working fine last night and this morning I am getting
Fatal error: Out of memory (allocated 1611137024) (tried to allocate
1610350592 bytes) in /home/twitcast/public_html/system/index.php on
line 121
The section of code being ran is as follows
function podcast()
{
$fetch = new server();
$fetch->connect("TCaster");
$collection = $fetch->db->shows;
// find everything in the collection
$cursor = $collection->find();
if($cursor->count() > 0)
{
$test = array();
// iterate through the results
while( $cursor->hasNext() ) {
$test[] = ($cursor->getNext());
}
$i = 0;
foreach($test as $d) {
for ( $i = 0; $i <= 3; $i ++) {
$url = $d["streams"][$i];
$xml = file_get_contents( $url );
$doc = new DOMDocument();
$doc->preserveWhiteSpace = false;
$doc->loadXML( $xml); // $xml = file_get_contents( "http://www.c3carlingford.org.au/podcast/C3CiTunesFeed.xml")
// Initialize XPath
$xpath = new DOMXpath( $doc);
// Register the itunes namespace
$xpath->registerNamespace( 'itunes', 'http://www.itunes.com/dtds/podcast-1.0.dtd');
$items = $doc->getElementsByTagName('item');
foreach( $items as $item) {
$title = $xpath->query( 'title', $item)->item(0)->nodeValue;
$published = strtotime($xpath->query( 'pubDate', $item)->item(0)->nodeValue);
$author = $xpath->query( 'itunes:author', $item)->item(0)->nodeValue;
$summary = $xpath->query( 'itunes:summary', $item)->item(0)->nodeValue;
$enclosure = $xpath->query( 'enclosure', $item)->item(0);
$url = $enclosure->attributes->getNamedItem('url')->value;
$fname = basename($url);
$collection = $fetch->db->shows_episodes;
$cursorfind = $collection->find(array("internal_url"=>"http://twitcatcher.russellharrower.com/videos/$fname"));
if($cursorfind->count() < 1)
{
$copydir = "/home/twt/public_html/videos/";
$data = file_get_contents($url);
$file = fopen($copydir . $fname, "w+");
fputs($file, $data);
fclose($file);
$collection->insert(array("show_id"=> new MongoId($d["_id"]),"stream"=>$i,"episode_title"=>$title, "episode_summary"=>$summary,"published"=>$published,"internal_url"=>"http://twitcatcher.russellharrower.com/videos/$fname"));
echo "$title <br> $published <br> $summary <br> $url<br><br>\n\n";
}
}
}
}
}
line 121 is
$data = file_get_contents($url);

Answer 1

You want to add 1.6GB of memory usage for a single PHP thread? While you can increase the memory limit, my strong advice is to look at another way of doing what you want.
Probably the easiest solution: you can use CURL to request a byte range of the source file (using Curl is wiser than get_file_contents anyway, for remote files). You can get 100K ata time, write to the local file then got the next 100k and appeand to the file etc, until the entire file is pulled in.
You may also do something with streams, but it gets a little more complex. This may be your only option if the remote server won't let you get part of a file by bytes.
Finally there's Linux commands such as wget, run through exec(), if your server has permissions.

Answer 2

Memory Limit - take a look at this directive. Suppose that is what you need.
or you may try to use copy instead of reading file to memory (which is video file, as I understand so there is nothing strange that it takes a lot of memory):
$copydir = "/home/twt/public_html/videos/";
copy($url, $copydir . $fname);
Looks like last night opened file were smaller)