note 84653 added to function.hash-file

For those who are wondering, there appears to be no fundamental difference between hash_file('md5')/hash_file('sha1') and md5_file()/sha1_file(). They produce identical output and have comparable performance. There is, however, a difference between hash_file('crc32') and something silly like crc32(file_get_contents()). crc32(file_get_contents())'s results are most similar to those of hash_file('crc32b'), just with the octets reversed: <?php $fname = "something.png"; $hash = hash_file( 'crc32', $fname ); echo "crc32 = $hash\n"; $hash = hash_file( 'crc32b', $fname ); echo "crc32b = $hash\n"; $hash = sprintf("%x",crc32(file_get_contents($fname))); echo "manual = $hash\n"; ?> crc32 = f41d7f4e crc32b = 7dafbba4 manual = a4bbaf7d ---- Server IP: 64.71.164.2 Probable Submitter: 209.125.44.92 ---- Manual Page -- http://www.php.net/manual/en/function.hash-file.php Edit -- https://master.php.net/note/edit/84653 Del: integrated -- https://master.php.net/note/delete/84653/integrated Del: useless -- https://master.php.net/note/delete/84653/useless Del: bad code -- https://master.php.net/note/delete/84653/bad+code Del: spam -- https://master.php.net/note/delete/84653/spam Del: non-english -- https://master.php.net/note/delete/84653/non-english Del: in docs -- https://master.php.net/note/delete/84653/in+docs Del: other reasons-- https://master.php.net/note/delete/84653 Reject -- https://master.php.net/note/reject/84653 Search -- https://master.php.net/manage/user-notes.php