Completely rewritten code.

Implement read-only zip file - class \PhpZip\ZipFile, create and update zip file - \PhpZip\ZipOutputFile.
Supports ZIP64 ext, Traditional PKWARE Encryption, WinZip AES Encryption.

tests/PhpZip/ZipTestCase.php

@@ -0,0 +1,45 @@
+<?php
+namespace PhpZip;
+
+/**
+ * PHPUnit test case and helper methods.
+ */
+class ZipTestCase extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Assert correct zip archive.
+     *
+     * @param $filename
+     */
+    public static function assertCorrectZipArchive($filename)
+    {
+        if (DIRECTORY_SEPARATOR !== '\\' && `which zip`) {
+            exec("zip -T " . escapeshellarg($filename), $output, $returnCode);
+
+            $output = implode(PHP_EOL, $output);
+
+            self::assertEquals($returnCode, 0);
+            self::assertNotContains('zip error', $output);
+            self::assertContains(' OK', $output);
+        }
+    }
+
+    /**
+     * Assert correct empty zip archive.
+     *
+     * @param $filename
+     */
+    public static function assertCorrectEmptyZip($filename)
+    {
+        if (DIRECTORY_SEPARATOR !== '\\' && `which zipinfo`) {
+            exec("zipinfo " . escapeshellarg($filename), $output, $returnCode);
+
+            $output = implode(PHP_EOL, $output);
+
+            self::assertContains('Empty zipfile', $output);
+        }
+        $actualEmptyZipData = pack('VVVVVv', ZipConstants::END_OF_CENTRAL_DIRECTORY_RECORD_SIG, 0, 0, 0, 0, 0);
+        self::assertEquals(file_get_contents($filename), $actualEmptyZipData);
+    }
+
+}