Zip and Unzip Files with PHP
Example code for zipping and unzipping files. Code taken from a tool called phpfilemanager.php
/* Source: https://github.com/gbif/dwca-adapters/tree/master/classes/zip */
/*--------------------------------------------------
| TAR/GZIP/BZIP2/ZIP ARCHIVE CLASSES 2.1
| By Devin Doucette
| Copyright (c) 2005 Devin Doucette
| Email: darksnoopy@shaw.ca
+--------------------------------------------------
| Email bugs/suggestions to darksnoopy@shaw.ca
+--------------------------------------------------
| This script has been created and released under
| the GNU GPL and is free to use and redistribute
| only if this copyright statement is not removed
+--------------------------------------------------*/
class archive
{
function archive($name)
{
$this->options = array (
'basedir' => ".",
'name' => $name,
'prepend' => "",
'inmemory' => 0,
'overwrite' => 0,
'recurse' => 1,
'storepaths' => 1,
'followlinks' => 0,
'level' => 3,
'method' => 1,
'sfx' => "",
'type' => "",
'comment' => ""
);
$this->files = array ();
$this->exclude = array ();
$this->storeonly = array ();
$this->error = array ();
}
function set_options($options)
{
foreach ($options as $key => $value)
$this->options[$key] = $value;
if (!empty ($this->options['basedir']))
{
$this->options['basedir'] = str_replace("\\", "/", $this->options['basedir']);
$this->options['basedir'] = preg_replace("/\/+/", "/", $this->options['basedir']);
$this->options['basedir'] = preg_replace("/\/$/", "", $this->options['basedir']);
}
if (!empty ($this->options['name']))
{
$this->options['name'] = str_replace("\\", "/", $this->options['name']);
$this->options['name'] = preg_replace("/\/+/", "/", $this->options['name']);
}
if (!empty ($this->options['prepend']))
{
$this->options['prepend'] = str_replace("\\", "/", $this->options['prepend']);
$this->options['prepend'] = preg_replace("/^(\.*\/+)+/", "", $this->options['prepend']);
$this->options['prepend'] = preg_replace("/\/+/", "/", $this->options['prepend']);
$this->options['prepend'] = preg_replace("/\/$/", "", $this->options['prepend']) . "/";
}
}
function create_archive()
{
$this->make_list();
if ($this->options['inmemory'] == 0)
{
$pwd = getcwd();
chdir($this->options['basedir']);
if ($this->options['overwrite'] == 0 && file_exists($this->options['name'] . ($this->options['type'] == "gzip" || $this->options['type'] == "bzip" ? ".tmp" : "")))
{
$this->error[] = "File {$this->options['name']} already exists.";
chdir($pwd);
return 0;
}
else if ($this->archive = @fopen($this->options['name'] . ($this->options['type'] == "gzip" || $this->options['type'] == "bzip" ? ".tmp" : ""), "wb+"))
chdir($pwd);
else
{
$this->error[] = "Could not open {$this->options['name']} for writing.";
chdir($pwd);
return 0;
}
}
else
$this->archive = "";
switch ($this->options['type'])
{
case "zip":
if (!$this->create_zip())
{
$this->error[] = "Could not create zip file.";
return 0;
}
break;
case "bzip":
if (!$this->create_tar())
{
$this->error[] = "Could not create tar file.";
return 0;
}
if (!$this->create_bzip())
{
$this->error[] = "Could not create bzip2 file.";
return 0;
}
break;
case "gzip":
if (!$this->create_tar())
{
$this->error[] = "Could not create tar file.";
return 0;
}
if (!$this->create_gzip())
{
$this->error[] = "Could not create gzip file.";
return 0;
}
break;
case "tar":
if (!$this->create_tar())
{
$this->error[] = "Could not create tar file.";
return 0;
}
}
if ($this->options['inmemory'] == 0)
{
fclose($this->archive);
if ($this->options['type'] == "gzip" || $this->options['type'] == "bzip")
unlink($this->options['basedir'] . "/" . $this->options['name'] . ".tmp");
}
}
function add_data($data)
{
if ($this->options['inmemory'] == 0)
fwrite($this->archive, $data);
else
$this->archive .= $data;
}
function make_list()
{
if (!empty ($this->exclude))
foreach ($this->files as $key => $value)
foreach ($this->exclude as $current)
if ($value['name'] == $current['name'])
unset ($this->files[$key]);
if (!empty ($this->storeonly))
foreach ($this->files as $key => $value)
foreach ($this->storeonly as $current)
if ($value['name'] == $current['name'])
$this->files[$key]['method'] = 0;
unset ($this->exclude, $this->storeonly);
}
function add_files($list)
{
$temp = $this->list_files($list);
foreach ($temp as $current)
$this->files[] = $current;
}
function exclude_files($list)
{
$temp = $this->list_files($list);
foreach ($temp as $current)
$this->exclude[] = $current;
}
function store_files($list)
{
$temp = $this->list_files($list);
foreach ($temp as $current)
$this->storeonly[] = $current;
}
function list_files($list)
{
if (!is_array ($list))
{
$temp = $list;
$list = array ($temp);
unset ($temp);
}
$files = array ();
$pwd = getcwd();
chdir($this->options['basedir']);
foreach ($list as $current)
{
$current = str_replace("\\", "/", $current);
$current = preg_replace("/\/+/", "/", $current);
$current = preg_replace("/\/$/", "", $current);
if (strstr($current, "*"))
{
$regex = preg_replace("/([\\\^\$\.\[\]\|\(\)\?\+\{\}\/])/", "\\\\\\1", $current);
$regex = str_replace("*", ".*", $regex);
$dir = strstr($current, "/") ? substr($current, 0, strrpos($current, "/")) : ".";
$temp = $this->parse_dir($dir);
foreach ($temp as $current2)
if (preg_match("/^{$regex}$/i", $current2['name']))
$files[] = $current2;
unset ($regex, $dir, $temp, $current);
}
else if (@is_dir($current))
{
$temp = $this->parse_dir($current);
foreach ($temp as $file)
$files[] = $file;
unset ($temp, $file);
}
else if (@file_exists($current))
$files[] = array ('name' => $current, 'name2' => $this->options['prepend'] .
preg_replace("/(\.+\/+)+/", "", ($this->options['storepaths'] == 0 && strstr($current, "/")) ?
substr($current, strrpos($current, "/") + 1) : $current),
'type' => @is_link($current) && $this->options['followlinks'] == 0 ? 2 : 0,
'ext' => substr($current, strrpos($current, ".")), 'stat' => stat($current));
}
chdir($pwd);
unset ($current, $pwd);
usort($files, array ("archive", "sort_files"));
return $files;
}
function parse_dir($dirname)
{
if ($this->options['storepaths'] == 1 && !preg_match("/^(\.+\/*)+$/", $dirname))
$files = array (array ('name' => $dirname, 'name2' => $this->options['prepend'] .
preg_replace("/(\.+\/+)+/", "", ($this->options['storepaths'] == 0 && strstr($dirname, "/")) ?
substr($dirname, strrpos($dirname, "/") + 1) : $dirname), 'type' => 5, 'stat' => stat($dirname)));
else
$files = array ();
$dir = @opendir($dirname);
while ($file = @readdir($dir))
{
$fullname = $dirname . "/" . $file;
if ($file == "." || $file == "..")
continue;
else if (@is_dir($fullname))
{
if (empty ($this->options['recurse']))
continue;
$temp = $this->parse_dir($fullname);
foreach ($temp as $file2)
$files[] = $file2;
}
else if (@file_exists($fullname))
$files[] = array ('name' => $fullname, 'name2' => $this->options['prepend'] .
preg_replace("/(\.+\/+)+/", "", ($this->options['storepaths'] == 0 && strstr($fullname, "/")) ?
substr($fullname, strrpos($fullname, "/") + 1) : $fullname),
'type' => @is_link($fullname) && $this->options['followlinks'] == 0 ? 2 : 0,
'ext' => substr($file, strrpos($file, ".")), 'stat' => stat($fullname));
}
@closedir($dir);
return $files;
}
function sort_files($a, $b)
{
if ($a['type'] != $b['type'])
if ($a['type'] == 5 || $b['type'] == 2)
return -1;
else if ($a['type'] == 2 || $b['type'] == 5)
return 1;
else if ($a['type'] == 5)
return strcmp(strtolower($a['name']), strtolower($b['name']));
else if ($a['ext'] != $b['ext'])
return strcmp($a['ext'], $b['ext']);
else if ($a['stat'][7] != $b['stat'][7])
return $a['stat'][7] > $b['stat'][7] ? -1 : 1;
else
return strcmp(strtolower($a['name']), strtolower($b['name']));
return 0;
}
function download_file()
{
if ($this->options['inmemory'] == 0)
{
$this->error[] = "Can only use download_file() if archive is in memory. Redirect to file otherwise, it is faster.";
return;
}
switch ($this->options['type'])
{
case "zip":
header("Content-Type: application/zip");
break;
case "bzip":
header("Content-Type: application/x-bzip2");
break;
case "gzip":
header("Content-Type: application/x-gzip");
break;
case "tar":
header("Content-Type: application/x-tar");
}
$header = "Content-Disposition: attachment; filename=\"";
$header .= strstr($this->options['name'], "/") ? substr($this->options['name'], strrpos($this->options['name'], "/") + 1) : $this->options['name'];
$header .= "\"";
header($header);
header("Content-Length: " . strlen($this->archive));
header("Content-Transfer-Encoding: binary");
header("Cache-Control: no-cache, must-revalidate, max-age=60");
header("Expires: Sat, 01 Jan 2000 12:00:00 GMT");
print($this->archive);
}
function save_file( $output_file = 'tmp' )
{
if ($this->options['inmemory'] == 0)
{
$this->error[] = "Can only use download_file() if archive is in memory. Redirect to file otherwise, it is faster.";
return;
}
file_put_contents( $output_file, $this->archive);
}
} Zip FIle Method
class zip_file extends archive
{
function zip_file($name)
{
$this->archive($name);
$this->options['type'] = "zip";
}
function create_zip()
{
$files = 0;
$offset = 0;
$central = "";
if (!empty ($this->options['sfx']))
if ($fp = @fopen($this->options['sfx'], "rb"))
{
$temp = fread($fp, filesize($this->options['sfx']));
fclose($fp);
$this->add_data($temp);
$offset += strlen($temp);
unset ($temp);
}
else
$this->error[] = "Could not open sfx module from {$this->options['sfx']}.";
$pwd = getcwd();
chdir($this->options['basedir']);
foreach ($this->files as $current)
{
if ($current['name'] == $this->options['name'])
continue;
$timedate = explode(" ", date("Y n j G i s", $current['stat'][9]));
$timedate = ($timedate[0] - 1980 << 25) | ($timedate[1] << 21) | ($timedate[2] << 16) |
($timedate[3] << 11) | ($timedate[4] << 5) | ($timedate[5]);
$block = pack("VvvvV", 0x04034b50, 0x000A, 0x0000, (isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate);
if ($current['stat'][7] == 0 && $current['type'] == 5)
{
$block .= pack("VVVvv", 0x00000000, 0x00000000, 0x00000000, strlen($current['name2']) + 1, 0x0000);
$block .= $current['name2'] . "/";
$this->add_data($block);
$central .= pack("VvvvvVVVVvvvvvVV", 0x02014b50, 0x0014, $this->options['method'] == 0 ? 0x0000 : 0x000A, 0x0000,
(isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate,
0x00000000, 0x00000000, 0x00000000, strlen($current['name2']) + 1, 0x0000, 0x0000, 0x0000, 0x0000, $current['type'] == 5 ? 0x00000010 : 0x00000000, $offset);
$central .= $current['name2'] . "/";
$files++;
$offset += (31 + strlen($current['name2']));
}
else if ($current['stat'][7] == 0)
{
$block .= pack("VVVvv", 0x00000000, 0x00000000, 0x00000000, strlen($current['name2']), 0x0000);
$block .= $current['name2'];
$this->add_data($block);
$central .= pack("VvvvvVVVVvvvvvVV", 0x02014b50, 0x0014, $this->options['method'] == 0 ? 0x0000 : 0x000A, 0x0000,
(isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate,
0x00000000, 0x00000000, 0x00000000, strlen($current['name2']), 0x0000, 0x0000, 0x0000, 0x0000, $current['type'] == 5 ? 0x00000010 : 0x00000000, $offset);
$central .= $current['name2'];
$files++;
$offset += (30 + strlen($current['name2']));
}
else if ($fp = @fopen($current['name'], "rb"))
{
$temp = fread($fp, $current['stat'][7]);
fclose($fp);
$crc32 = crc32($temp);
if (!isset($current['method']) && $this->options['method'] == 1)
{
$temp = gzcompress($temp, $this->options['level']);
$size = strlen($temp) - 6;
$temp = substr($temp, 2, $size);
}
else
$size = strlen($temp);
$block .= pack("VVVvv", $crc32, $size, $current['stat'][7], strlen($current['name2']), 0x0000);
$block .= $current['name2'];
$this->add_data($block);
$this->add_data($temp);
unset ($temp);
$central .= pack("VvvvvVVVVvvvvvVV", 0x02014b50, 0x0014, $this->options['method'] == 0 ? 0x0000 : 0x000A, 0x0000,
(isset($current['method']) || $this->options['method'] == 0) ? 0x0000 : 0x0008, $timedate,
$crc32, $size, $current['stat'][7], strlen($current['name2']), 0x0000, 0x0000, 0x0000, 0x0000, 0x00000000, $offset);
$central .= $current['name2'];
$files++;
$offset += (30 + strlen($current['name2']) + $size);
}
else
$this->error[] = "Could not open file {$current['name']} for reading. It was not added.";
}
$this->add_data($central);
$this->add_data(pack("VvvvvVVv", 0x06054b50, 0x0000, 0x0000, $files, $files, strlen($central), $offset,
!empty ($this->options['comment']) ? strlen($this->options['comment']) : 0x0000));
if (!empty ($this->options['comment']))
$this->add_data($this->options['comment']);
chdir($pwd);
return 1;
}
} Unzip File Method
function unzip_file($zip_name, $current_path, $destination_path){
$zip = zip_open($current_path.$zip_name);
if($zip){
while ($zip_entry = zip_read($zip)){
if(zip_entry_filesize($zip_entry)){
$complete_path = dirname(zip_entry_name($zip_entry));
$complete_name = zip_entry_name($zip_entry);
if(!file_exists($destination_path.$complete_path)){
$tmp = '';
foreach(explode('/',$complete_path) as $k){
$tmp .= $k.'/';
if(!file_exists($destination_path.$tmp)){
@mkdir($destination_path.$tmp, 0755);
@chmod($destination_path.$tmp, 0755 );
}
}
}
if(zip_entry_open($zip, $zip_entry, "r")){
if($fd = fopen($destination_path.$complete_name, 'w')){
fwrite($fd, zip_entry_read($zip_entry, zip_entry_filesize($zip_entry)));
fclose($fd);
@chmod($destination_path, 0644);
} else {
echo "fopen($destination_path.$complete_name) error<br>";
}
zip_entry_close($zip_entry);
} else {
echo "zip_entry_open($zip,$zip_entry) error<br>";
}
}
}
zip_close($zip);
}
} Example Usage:
Zipping Files:
$current_dir = getcwd();
$files = array('front-page.php', 'functions.php', 'header.php', 'carlo-fontanos');
$zipname = 'myzip_carlo.zip';
ignore_user_abort(true);
ini_set("display_errors",0);
ini_set("max_execution_time",0);
$zipfile = new zip_file($zipname);
if($zipfile){
$zipfile->set_options(array('basedir'=>$current_dir,'overwrite'=>1,'level'=>3));
if($files){
foreach($files as $file){
$zipfile->add_files(trim($file));
}
}
$zipfile->create_archive();
}
unset($zipfile); Unzipping Files:
$current_dir = getcwd();
unzip_file('theme-backup-12-11-2017.zip', $current_dir . '/', $current_dir . '/extracted/');
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