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Draw the architecture of Zend engine?
 Question Submitted By :: PHP
I also faced this Question!!     Answer Posted By  
# 1
The Zend Engine is the internal compiler and runtime engine
used by
PHP4. Developed by Zeev Suraski and Andi Gutmans, the Zend
Engine is an
abbreviation of their names. In the early days of PHP4, it
worked as

The PHP script was loaded by the Zend Engine and compiled
into Zend
opcode. Opcodes, short for operation codes, are low level binary
instructions. Then the opcode was executed and the HTML
generated sent
to the client. The opcode was flushed from memory after
execution.Today, there are a multitude of products and
techniques to help you
speed up this process.

In the following diagram, we show the how modern
PHP scripts work; all the shaded boxes are optional.

PHP Scripts are loaded into memory and compiled into Zend

(oops..i couldn't copy the images. is there any other way to
post them?)
Is This Answer Correct ?    30 Yes 3 No
# 2
Zend Engine is used internally by PHP as a complier and
runtime engine. PHP Scripts are loaded into memory and
compiled into Zend opcodes. These opcodes are executed and
the HTML generated is sent to the client. The same is
depicted below

Zend Engine
What is zend engine in PHP?

Zend engine is like a virtual machine and is an open source,
and is known for its role in automating the web using PHP.
Zend is named after its developers Zeev and Aandi. Its
reliability, performance and extensibility has a significant
role in increasing the PHP’s popularity. The Zend Engine II
is the heart of PHP 5. It is an open source project and
freely available under BSD style license.

for more visit :
Is This Answer Correct ?    4 Yes 1 No
# 3
Here are a couple of links to see the images of the
architecture of Zend -

Note - After few time, these link may not be available or

You may also refer to the overall (composite info) link -

Amit Verma
Is This Answer Correct ?    4 Yes 2 No
# 4
upload images on some free image hosting sites
and give links here.
go to google and search for free image hosting
Is This Answer Correct ?    3 Yes 7 No
Umakant Patil

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