At 5:54 PM -0700 4/27/06, Paul Novitski wrote:
At 04:39 PM 4/27/2006, tedd wrote:
What I don't get is how php can pass variables to js and cause it
to run "at will".
Do you mean the way one function can call another function within
the same program?
No, I realize that php are two different language on two different
computers sharing one event.
It sounds like you're picturing PHP & JavaScript executing
continuously & simultaneously. You aren't, are you?
Not simultaneously and/or continuously but an easy way to communicate
with each other.
JavaScript can execute a PHP program "at will" simply by requesting
a PHP page from the server. PHP can execute a JavaScript function
"at will" simply by downloading it (with at least minimal HTML
markup) to a browser.
That seems pretty simple & direct to me, considering that they're
running in different computers.
What's simple and direct to you may not be to others -- and I fully
realize that both environments are running on different computers at
different times -- it's the your perspective of "at will" I need to
come to terms with.
I can see how php can, and have used php to, generate a web page
which has <body onload="js()"> tag, which can pass a variable to js
and will cause js to execute. But, isn't there anything else? Is
that all there is?
...
I also understand that php can generate html (have done it) and
echo out javascript that may, or may not, run if js is present --
like Robert suggested in his WAHOOEY (LOL) example. But, that
appears messy to me. If php wants to say something to js, then a
page must be created -- it seems like a lot foreplay to get at the
goodies.
Without a downloaded page, what goodies are there?
You know, you can download pure JavaScript, dressed only in a script
tag, to a browser and have it execute without carrying with it a
whole HTML page. Is that what you're looking for? What would such
a script accomplish that a PHP program couldn't? I suppose it could
interact with the human user with prompts, alerts, and confirms;
gather information about the client such as monitor & window size;
grab local time to compare to server time. What else? If it has to
create DOM nodes to interact with the user, haven't you come full
circle and shouldn't you just download an HTML page to be
JavaScript's environment?
I guess what I'm looking for is something simpler -- is there?
Paint me a picture of a hypothetical simpler situation; I'm intrigued.
I think you have provided me with a clearer picture of what's going
on and some things for me to consider. I need to pound some code.
Thanks for your time and insight.
tedd
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