add method for zipping files instead of using zip command

inc/inc.ClassExtensionMgr.php

@@ -190,6 +190,61 @@ class SeedDMS_Extension_Mgr {
 		return $extensions;
 	} /* }}} */
 
+	static protected function Zip($source, $destination, $include_dir = false) { /* {{{ */
+
+		if (!extension_loaded('zip') || !file_exists($source)) {
+			return false;
+		}
+
+		if (file_exists($destination)) {
+			unlink ($destination);
+		}
+
+		$zip = new ZipArchive();
+		if (!$zip->open($destination, ZIPARCHIVE::CREATE)) {
+			return false;
+		}
+		$source = str_replace('\\', '/', realpath($source));
+
+		if (is_dir($source) === true) {
+			$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);
+
+			if ($include_dir) {
+				$arr = explode("/",$source);
+				$maindir = $arr[count($arr)- 1];
+
+				$source = "";
+				for ($i=0; $i < count($arr) - 1; $i++) { 
+					$source .= '/' . $arr[$i];
+				}
+
+				$source = substr($source, 1);
+
+				$zip->addEmptyDir($maindir);
+			}
+
+			foreach ($files as $file) {
+				$file = str_replace('\\', '/', $file);
+
+				// Ignore "." and ".." folders
+				if( in_array(substr($file, strrpos($file, '/')+1), array('.', '..')) )
+					continue;
+
+				$file = realpath($file);
+
+				if (is_dir($file) === true) {
+					$zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
+				} else if (is_file($file) === true) {
+					$zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
+				}
+			}
+		} else if (is_file($source) === true) {
+			$zip->addFromString(basename($source), file_get_contents($source));
+		}
+
+		return $zip->close();
+	} /* }}} */
+
 	/**
 	 * Create zip archive of an extension
 	 *
@@ -203,8 +258,11 @@ class SeedDMS_Extension_Mgr {
 
 		$tmpfile = $this->cachedir."/".$extname."-".$version.".zip";
 
-		$cmd = "cd ".$this->extdir."/".$extname."; zip -r ".$tmpfile." .";
+		if(!SeedDMS_Extension_Mgr::Zip($this->extdir."/".$extname, $tmpfile)) {
-		exec($cmd);
+			return false;
+		}
+//		$cmd = "cd ".$this->extdir."/".$extname."; zip -r ".$tmpfile." .";
+//		exec($cmd);
 
 		return $tmpfile;
 	} /* }}} */