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/ZipOutputZipFileEntry.php

@@ -0,0 +1,56 @@
+<?php
+namespace PhpZip\Output;
+
+use PhpZip\Exception\ZipException;
+use PhpZip\Model\ZipEntry;
+use PhpZip\ZipFile;
+
+/**
+ * Zip output entry for input zip file.
+ *
+ * @author Ne-Lexa alexey@nelexa.ru
+ * @license MIT
+ */
+class ZipOutputZipFileEntry extends ZipOutputEntry
+{
+    /**
+     * Input zip file.
+     *
+     * @var ZipFile
+     */
+    private $inputZipFile;
+
+    /**
+     * Input entry name.
+     *
+     * @var string
+     */
+    private $inputEntryName;
+
+    /**
+     * ZipOutputZipFileEntry constructor.
+     * @param ZipFile $zipFile
+     * @param ZipEntry $zipEntry
+     * @throws ZipException If input zip file is null.
+     */
+    public function __construct(ZipFile $zipFile, ZipEntry $zipEntry)
+    {
+        if ($zipFile === null) {
+            throw new ZipException('ZipFile is null');
+        }
+        parent::__construct(clone $zipEntry);
+
+        $this->inputZipFile = $zipFile;
+        $this->inputEntryName = $zipEntry->getName();
+    }
+
+    /**
+     * Returns entry data.
+     *
+     * @return string
+     */
+    public function getEntryContent()
+    {
+        return $this->inputZipFile->getEntryContent($this->inputEntryName);
+    }
+}