PHP 文件在线解压缩的函数代码

PHP Zip解压 文件在线解压缩的函数代码

/**********************

*@file - path to zip file
*@destination - destination directory for unzipped files
*/
function unzip_file($file, $destination){
// create object
$zip = new ZipArchive() ;
// open archive
if ($zip->open($file) !== TRUE) {
die (Could not open archive);
}
// extract contents to destination directory
$zip->extractTo($destination);
// close archive
$zip->close();
echo Archive extracted to directory;
}

/* creates a compressed zip file */
function create_zip($files = array(),$destination = ,$overwrite = false) {
//if the zip file already exists and overwrite is false, return false
if(file_exists($destination) && !$overwrite) { return false; }
//vars
$valid_files = array();
//if files were passed in...
if(is_array($files)) {
//cycle through each file
foreach($files as $file) {
//make sure the file exists
if(file_exists($file)) {
$valid_files[] = $file;
}
}
}
//if we have good files...
if(count($valid_files)) {
//create the archive
$zip = new ZipArchive();
if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
return false;
}
//add the files
foreach($valid_files as $file) {
$zip->addFile($file,$file);
}
//debug
//echo The zip archive contains ,$zip->numFiles, files with a status of ,$zip->status;

//close the zip -- done!
$zip->close();

//check to make sure the file exists
return file_exists($destination);
}
else
{
return false;
}
}
/***** Example Usage ***/
$files=array(file1.jpg, file2.jpg, file3.gif);
create_zip($files, myzipfile.zip, true);