Need PHP script to decompress and loop through zipped file - php

Question

I am using a fairly straight-forward script to open and parse several xml files that are gzipped. I also need to do the same basic operation with a ZIP file. It seems like it should be simple, but I haven't been able to find what looked like equivalent code anywhere.
Here is the simple version of what I am already doing:
$import_file = "source.gz";
$sfp = gzopen($import_file, "rb"); ///// OPEN GZIPPED data
while ($string = gzread($sfp, 4096)) { //Loop through the data
/// Parse Output And Do Stuff with $string
}
gzclose($sfp);
What would do the same thing for a zipped file?

Answer 1

If you have PHP 5 >= 5.2.0, PECL zip >= 1.5.0 then you may use the ZipArchive libraries:
$zip = new ZipArchive;
if ($zip->open('source.zip') === TRUE)
{
for($i = 0; $i < $zip->numFiles; $i++)
{
$fp = $zip->getStream($zip->getNameIndex($i));
if(!$fp) exit("failed\n");
while (!feof($fp)) {
$contents = fread($fp, 8192);
// do some stuff
}
fclose($fp);
}
}
else
{
echo 'Error reading zip-archive!';
}

Answer 2

There is a smart way to do it with ZipArchive. You can use a for loop with ZipArchive::statIndex() to get all the information you need. You can access the files by their index (ZipArchive::getFromIndex()) or name (ZipArchive::getFromName()).
For example:
function processZip(string $zipFile): bool
{
$zip = new ZipArchive();
if ($zip->open($zipFile) !== true) {
echo '<p>Can\'t open zip archive!</p>';
return false;
}
// As long as statIndex() does not return false keep iterating
for ($idx = 0; $zipFile = $zip->statIndex($idx); $idx++) {
$directory = \dirname($zipFile['name']);
if (!\is_dir($zipFile['name'])) {
// file contents
$contents = $zip->getFromIndex($idx);
}
}
$zip->close();
}