Does any one know how to implement auto complete feature in php using javascript and postgres db. I dont want to use ajax for this purpose.
If you mean that you don't want to use XMLHttpRequest by saying that you don't want to use AJAX, there are another techniques to achieve same results. For example JSONP. You should be more specific in your question.
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I have a table with a button which onClick calls an external javascript file, which calculates some values and returns them to the table. I need to then write that value back to a file using PHP without leaving the current page. Is there any way to do this? I thought about trying onChange, but I wasn't sure how ot make that work with php since it's usually a javascript call.
PHP is executed on your server
the javascript file, even if external, is run on the client machine.
You can't use PHP on the client machine! You must use javascript to call a php script, stored in your server, that do what you need to.
You're on the good track, you need to use AJAX calls in your javascript.
don't use onclick, search for unobtrusive javascript;
you'd be using jQuery, so you can use its ajax handler;
find out a good reading about the whole topic, before going heads down on writing code.
This sounds like something you could solve by using AJAX. Basically you would communicate with your server in the background, send the data to it so it can process it. You send a separate request in the background which happens without reloading the page.
Please be aware of the distinction between the client (where the JavaScript is run) and the server (where PHP generated the page run by the client).
If you want to use jQuery, that library has some decent functions that makes it easier to implement cross-browser AJAX requests. However I would suggest first researching the topic.
I have been using xajax, as a server side ajax class (all the ajax response is handled with php code) for the longest while.
However I lately fell in love with jquery, and am using it for a project. I would like to know if there is a server side class (like xajax) that handles jquery ajax? or does anyone know of a tutorial/example i can use to create my own?
Thank you in advance
Here are two alternatives:
http://phery-php-ajax.net/
https://github.com/spantaleev/sijax/
Updated link for phery library
Jquery(javascript) is a frontend/public language. Of course you will need to verify any data sent via javascript, on the server-side and/or both on the front-end.
jQuery has a plethora of options concerning ajax. ( $.post/$.get/$.getJSON/$.ajax ). these send/retrieve data via a HTTP request.
If you have leaned towards jQuery, why would you want a php-ajax library? You will do your input validating server-side anyway!
jquery/ajax will send your data either with a post or get request, you just grab it with php and verify.
For a user-friendly experience I would suggest both frontend/backend validating.
I'am thinking about to turn this flash application into php or javascript.
Here is the example:
http://bit.ly/uAjsm6
With php everytime the customer selects a color and the page must reload.
If I do it with ajax, I cant find a solution to give the selected value into php.
Do you know a better solution without flash?
You can simple do with jQuery
here are some useful articles:
http://desizntech.info/demo/jQuery_color_animation/
http://buildinternet.com/2009/09/its-a-rainbow-color-changing-text-and-backgrounds/
I'm trying to emulate the upvote/downvote system used on the SE sites. Each of my pages have a score which users can upvote or downvote.
The arrows are images with onclick links to javascript functions. I need to find a way to dynamically change the score without refreshing the page and then run a script (probably PHP) to increment the score in the server's data files.
Is javascript the best way to do this? I'm not that big of a fan of letting users see the source for my functions.
This is only possible using Javascript.
Don't worry about users seeing the source; as long as the server is secure and well-designed, it won't do any harm.
You should only implement display and validation logic in Javascript; everything must be validated again on the server.
Welcome to AJAX.
The easiest way to do that is to use jQuery and its $.ajax method.
See http://api.jquery.com/jQuery.ajax/
It's as simple as
$('a.upvote-button').click(function() {
$.ajax('/posts/123/upvote', {type: 'post'});
return false;
});
Yes, you need javascript (or something considerably less sane) to do this. Namely, you need an AJAX callback.
I'm not that big of a fan of letting users see the source for my functions.
The client-side source of your "function" would be ridiculously simple. It could be as simple as:
$.post('/1234567/vote/up')
You may use a direct link to a php script (and form post values) instead, and without a javascript library it would be a few more lines, but you shouldn't need to expose anything of value in your javascript.
Use javascript. JQuery is an excellent choice for manipulating on screen content and interacting with a server via asynchronous calls.
What should I look into to accomplish this.
When you select an input field some text to the right shows up.
For example: https://twitter.com/signup
Anyway i need something like that works with PHP. What should I look in to?
And also How can you query the database and not have to reload the page to see result? For example i have seen on many sites registration you can check if the a username is used without the page reloading. Dont know how to explain better.
Thanks
Like Arkain said, they are making the text appear with JavaScript. PHP is server-side only, meaning it can't make any changes to the page once it has loaded.
You can however, call a PHP script dynamically (to check if a username is registered) using a technique called AJAX.
I'd look into Ajax using jQuery. I had done some things with ajax before trying jQuery but jQuery made it so easy that I found it enjoyable to keep implementing things using it.
You need to use JavaScript, look at this source for instance, for some beginner tutorials.
Learn JavaScript. You can start with jQuery (a pre-made javascript toolkit of functions that help you do many things without reloading the page).
Google for a jQuery Ajax tutorial.