Zend Engine 1

Table of Contents

• Old introduction
• Streams API for PHP Extension Authors
• Zend API：深入 PHP 内核
• TSRM API

Zend Engine 1 is the internal engine used by PHP for the entire version 4 release line. It is no longer considered active, but PHP 4 is still in widespread use, so the old ZE1 documentation is preserved here exactly as it was.