Read part of a file in PHP

Question

I would like to read the last 1 megabyte of a MP3 file and calculate SHA1 checksum for just that part of the file. The reason that I would want this is that when I\'m looking fo

Answer 1

You'd have to use the c wrappers for file manipulation: fopen, fseek and fread:

$size = 1024 * 1000;
$handle = fopen($file, 'r');
fseek($handle, -$size);
$limitedContent = fread($handle, $size);
$hash = md5($limitedContent);