set_time_limit(0);
ini_set('memory_limit', '512M');
//擷取目前時間
function getTime($convert = true)
{
return microtime($convert);
}
//擷取當前記憶體
function memory()
{
return memory_get_usage();
}
$m = memory();
$s = getTime();
$file = file_get_contents("a.zip", true);
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: " . filesize('a.zip'));
header('Content-Disposition: attachment; filename="a.zip"');
echo $file;
error_log('file_put_contents: 記憶體:'.(memory()-$m).',耗時:'.(getTime()-$s).'\r\n',3,'D:/1.txt');
/* readfile() benchmark */
$m = memory();
$s = getTime();
ob_start();
header('Content-Type: application/octet-stream');
header("Accept-Ranges: bytes");
header("Accept-Length: " . filesize('a.zip'));
header('Content-Disposition: attachment; filename="a.zip"');
header('Content-Transfer-Encoding: binary');
readfile('a.zip');
ob_end_clean();
error_log('readfile: 記憶體:'.(memory()-$m).',耗時:'.(getTime()-$s).'\r\n',3,'D:/1.txt');
結果如下:
2k檔案
file_put_contents: 記憶體:2304,耗時:0.00099992752075195
readfile: 記憶體:888,耗時: 0.002000093460083
20M檔案
file_put_contents: 記憶體:50126256,耗時:0.21602201461792
readfile: 記憶體:896,耗時:0.071007013320923
153M檔案
file_put_contents: 記憶體:321370872,耗時:1.0341031551361
readfile: 記憶體:840,耗時:1.9421939849854
結論:相同條件下在下載大檔案時使用readfile更省記憶體,不容易導致php記憶體溢出問題。
以上就介紹了 PHP 下載 file_put_contents vs readfile,包括了方面的內容,希望對PHP教程有興趣的朋友有所協助。