What potential issues can arise when attempting to download multiple files at once using PHP?

One potential issue when attempting to download multiple files at once using PHP is that it may overload the server and cause performance issues. To solve this, you can limit the number of concurrent downloads by using a queue system or implementing a delay between each download request. 

// Example code to limit concurrent downloads using a queue system
$files = ['file1.txt', 'file2.txt', 'file3.txt'];
$downloadQueue = new SplQueue();

foreach ($files as $file) {
    $downloadQueue->enqueue($file);
}

while (!$downloadQueue->isEmpty()) {
    $file = $downloadQueue->dequeue();
    // Download file here
    usleep(1000000); // Delay for 1 second between each download
}

Keywords

concurrent downloads memory exhaustion file_get_contents cURL timeout error

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