(PHP 5 >= 5.2.0, PECL zip >= 1.1.0)
ZipArchive::statIndex — Get the details of an entry defined by its index.
$index
[, int $flags
] )The function obtains information about the entry defined by its index.
index
Index of the entry
flags
ZipArchive::FL_UNCHANGED may be ORed to it to request
information about the original file in the archive,
ignoring any changes made.
Returns an array containing the entry details 或者在失败时返回 FALSE.
Example #1 Dump the stat info of an entry
<?php
$zip = new ZipArchive;
$res = $zip->open('test.zip');
if ($res === TRUE) {
print_r($zip->statIndex(3));
$zip->close();
} else {
echo 'failed, code:' . $res;
}
?>
以上例程的输出类似于：
Array
(
[name] => foobar/baz
[index] => 3
[crc] => 499465816
[size] => 27
[mtime] => 1123164748
[comp_size] => 24
[comp_method] => 8
)
Chris Lewis (2011-12-20 00:15:26)
Note that the signed-integer CRC result is only true on 32-bit systems. 64-bit systems return correct CRCs.
A safer way (as recommended by crc32() function page) might be:
if ($file['crc'] < 0)
$file['crc'] = sprintf("%u",$file['crc']);
Anonymous (2011-11-16 08:20:27)
The CRC returned from this method is a signed number and so can be negative. This isn't how most CRC's are represented and so can cause problems. Another thing to know is that the standerd CRC algorithm used for zip files is CRC32b.
So to put this together lets say that you wanted to extract the first file from a zip and then compare the original CRC with the CRC for the extracted file this is what you would need to do. (proper error checking is omitted for simplicity).
<?php
$zip = new ZipArchive();
$zip->open("myZip.zip");
$stat = $zip->statIndex( 0 );
$name = $stat['name'];
$oldCrc = $stat['crc'];
$zip->extractTo("myPath", $name);
$newCrc = hexdec(hash_file("crc32b", "myPath/" . $name));
// Have to test both cases as the unsigned CRC from within the zip might appear negative as a signed int.
if($newCrc !== $oldCrc && ($oldCrc + 4294967296) !== $newCrc) {
echo "The files don't match!";
}
?>