Phase III: 1998 - present

• Zend Engine (first beta released in May 1999): conceptual quantum leap in design.

• Zend Engine incorporated into PHP 4 Beta 1 version (July 1999).

• Release of PHP 4 Beta 4 (February 2000)

• Main concept.

  • “Compile First, Execute Later” paradigm, replacing PHP 3’s “Execute While Parsing” paradigm.

• Even complex scripts run fast (5 – 200 factor with respect to PHP 3).

Notes: