note 48683 modified in function.readfile by aidan
| From: | aidan@php.net | Date: | Sat, 22 Jan 2005 08:29:52 +0000 |
| Subject: | note 48683 modified in function.readfile by aidan | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-83772@lists.php.net to get a copy of this message | ||
When using readfile() with very large files, it's possible to run into problems due to the
memory_limit setting; apparently readfile() pulls the whole file into memory at once.
One solution is to make sure memory_limit is larger than the largest file you'll use with
readfile(). A better solution is to write a chunking readfile. Here's a simple one that
doesn't exactly conform to the API, but is close enough for most purposes:
<?php
function readfile_chunked ($filename) {
$chunksize = 1*(1024*1024); // how many bytes per chunk
$buffer = '';
$handle = fopen($filename, 'rb');
if ($handle === false) {
return false;
}
while (!feof($handle)) {
$buffer = fread($handle, $chunksize);
print $buffer;
}
return fclose($handle);
}
?>
--was--
When using readfile() with very large files, it's possible to run into problems due to the
memory_limit setting; apparently readfile() pulls the whole file into memory at once.
One solution is to make sure memory_limit is larger than the largest file you'll use with
readfile(). A better solution is to write a chunking readfile. Here's a simple one that
doesn't exactly conform to the API, but is close enough for most purposes:
function readfile_chunked ($filename) {
$chunksize = 1*(1024*1024); // how many bytes per chunk
$buffer = '';
$handle = fopen($filename, 'rb');
if ($handle === false) {
return false;
}
while (!feof($handle)) {
$buffer = fread($handle, $chunksize);
print $buffer;
}
return fclose($handle);
}
http://php.net/manual/en/function.readfile.php