Description:
------------
This should be a quickie. In example 1 for 
ZipArchive::renameName, instead of specifying $zip->renameName 
in the code, you use $zip->renameIndex, which will obviously 
cause an error. 

Reproduce code:
---------------
Here's what you have:
<?php
$zip = new ZipArchive;
$res = $zip->open('test.zip')
if ($res === TRUE) {
   $zip->renameIndex('currentname.txt','newname.txt');
   $zip->close();
} else {
   echo 'failed, code:' . $res;
}
?>

Should be

<?php
$zip = new ZipArchive;
$res = $zip->open('test.zip')
if ($res === TRUE) {
   $zip->renameName('currentname.txt','newname.txt');
   $zip->close();
} else {
   echo 'failed, code:' . $res;
}
?>