Learning AJAX

[blueparukia]

Do you have any recommended Ajax tutorials?

[ZiNgA BuRgA]

Google?

If you know Javascript, AJAX is easy (cause AJAX is Javascript ).  Thus I'd start by looking into Javascript first.

[blueparukia]

I know Javascript and PHP well, but I just can't get Ajax. I have tried the sites I normally learn from (w3schools and Tizag), but if I execute the example scripts one, then change the echo output in the php file, the result stays the same as the previous one.

But thats my problem. I vow to learn it one day

[ZiNgA BuRgA]

Umm, tried sending no cache headers, or clearing the cache?

[blueparukia]

OK, clearing the cache works, but is highly annoying to do - and is only necessary on Opera. it works fine on IE7 and Firefox 2. Basically I want to click a button, and everytime the button is clicked, the exact time is shown, but in Opera you have to clear the cache EVERY time, so the time does not update.

Sending a no-cache header does work though - thanks a tonne

[blueparukia]

OK, so I have a few Ajax questions that Zinga will know

1. Can you execute specific PHP functions?
Say all my PHP file contains is

PHP Code:

<? function name(){echo "something";} ?>

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Is it possible to specify (in the JS) to execute only that function?

2. Retrieving a value from an input

How do I do this in the PHP. Say I have

HTML Code

<input name="input" type="text">

---

  

How do I transfer that to the PHP form without submitting it? Via $_GET?.

That is all my incredibly inportant questions,

BP

[ZiNgA BuRgA]

Consider something like this:

HTML Code

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

<form onsubmit="doAjaxSubmit(this);" method="post" action="..."> <input type="text" name="myvalue" /> <input type="submit" value="Go" /> </form> <script language="javascript"> <!-- function doAjaxSubmit(fObj) { var requestString = fObj.elements[0].name+'='+fObj.elements[0].value; // I _think_ that's correct... // I'm going to assume you're writing for MyBB, and using the moofx library new ajax("xmlhttp.php?action=my_custom_action", {method: "post", postBody: requestString, onComplete: function(request) { doAjaxComplete(request); }}); } function doAjaxComplete(response) { // handle stuff when AJAX request is complete here } //--> </script>

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PHP Code:

//... if($mybb->input['action'] == 'my_custom_action') execute_my_custom_function(); //...

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[blueparukia]

No, I am not coding for MyBB. Afaik I am not using any libraris, I am just codig straight into Notepad++...

Thanks for your help though.

[ZiNgA BuRgA]

^ Just use the moo.fx library - it's small and portable.

If you don't want to, you'll have to interface with xmlhttp request object yourself, and also handle various browser oddities...

Up to you.

[blueparukia]

I'll look into it on Sunday. My grandparent just bought a new yacht. So we're going out to the reef for a few days