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.

src/PhpZip/Output/ZipOutputStringEntry.php

@@ -0,0 +1,46 @@
+<?php
+namespace PhpZip\Output;
+
+use PhpZip\Exception\ZipException;
+use PhpZip\Model\ZipEntry;
+
+/**
+ * Zip output entry for string data.
+ *
+ * @author Ne-Lexa alexey@nelexa.ru
+ * @license MIT
+ */
+class ZipOutputStringEntry extends ZipOutputEntry
+{
+    /**
+     * Data content.
+     *
+     * @var string
+     */
+    private $data;
+
+    /**
+     * @param string $data
+     * @param ZipEntry $entry
+     * @throws ZipException If data empty.
+     */
+    public function __construct($data, ZipEntry $entry)
+    {
+        parent::__construct($entry);
+        $data = (string)$data;
+        if ($data === null) {
+            throw new ZipException("data is null");
+        }
+        $this->data = $data;
+    }
+
+    /**
+     * Returns entry data.
+     *
+     * @return string
+     */
+    public function getEntryContent()
+    {
+        return $this->data;
+    }
+}