(PHP 5 >= 5.6.0, PECL zip >= 1.12.4)
ZipArchive::getExternalAttributesIndex — Retrieve the external attributes of an entry defined by its index
$index
   , int &$opsys
   , int &$attr
   [, int $flags
  ] )Retrieve the external attributes of an entry defined by its index.
indexIndex of the entry.
opsysOn success, receive the operating system code defined by one of the ZipArchive::OPSYS_ constants.
attrOn success, receive the external attributes. Value depends on operating system.
flags
       If flags is set to ZipArchive::FL_UNCHANGED, the original unchanged
       attributes are returned.
      
   Returns TRUE on success or FALSE on failure.
  
This example extract all the entries of a ZIP archive test.zip and set the Unix rights from external attributes.
Example #1 Extract all entries with Unix rights
<?php
$zip = new ZipArchive();
if ($zip->open('test.zip') === TRUE) {
    for ($idx=0 ; $s = $zip->statIndex($idx) ; $idx++) {
        if ($zip->extractTo('.', $s['name'])) {
            if ($zip->getExternalAttributesIndex($idx, $opsys, $attr) 
                && $opsys==ZipArchive::OPSYS_UNIX) {
               chmod($s['name'], ($attr & 07777));
            }
        }
    }
    $zip->close();
    echo "Ok\n";
} else {
    echo "KO\n";
}
?>