Posted by Richard Lynch on 02/10/05 21:42

Ed Curtis wrote:
> On Thu, 10 Feb 2005, Richard Lynch wrote:
>>
>> In honor of our recent Super Bowl, here is a slow-motion instant replay:
>>
>> Bob: "Well, it's a great day so far for PHP today, isn't it Jim?"
>> Jim: "You've got that right, Bob! Now let's check out this play."
>> Bob: "Watch as the user surfs right to that web page!"
>> Jim: "Yeah, smooth!"
>> Bob: "Then, Apache detects the .php in the URL and hands off the action
>> to
>> PHP!"
>> Jim: "PHP has been really strong today, hasn't it?"
>> Bob: "Sure has, Jim!"
>> Jim: "Then, PHP builds up some HTML and JavaScript and sends it out!"
>> Bob: "Yeah, and then PHP says 'Job Done.'"
>> Jim: "You've got that right, Bob! PHP is outta the game for now,
>> resting."
>> Bob: "Now watch carefully as the user interacts with the browser."
>> Jim: "Pay particular attention as they change items in the filelist
>> box."
>> Bob: "Oooooh! What a fumble!!!"
>> Jim: "Yeah, it's definitely much too late to be handing off to PHP!"
>> Bob: "Sure is, Jim. PHP has been out of the game now for awhile!"
>>
>> Copyright Richard Lynch and the NFL.
>> Unauthorized re-broadcast is a violation of Federal Law.
>
> Your comments are quite funny but wouldn't it have been alot easier to
> say that you can't call a PHP function within a generated HTML element?
> You can however use the onChange event to call another PHP script that
> will perform the function. Not nearly as many keystrokes :)

The other 237 times I've answered this question, the reader doesn't
understand *WHY* they can't do that unless it's broken down into a
slow-motion instant replay of server-side versus client-side.

And if they don't understand *THAT*, they are going to have troubles down
the road with Cookies, HTTP Authentication, scraping from SSL sites,
sessions, and probably a couple other PHP topics.

I'd rather get them thinking about this now than answer a dozen more
questions all stemming from a fundamental lack of understanding of the
interaction of browser, server, and PHP. YMMV

I know *I* didn't get this until somebody was kind enough to build a
diagram of what happens in an HTTP exchange. It's in the archives (about
6 years back, mind you...)

So I typed Jim, Bob and "" a lot, and a couple extra lines for fun.
[shrug] I type fast anyway. :-)

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