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I have an img with a link of a request next every reply in one post. and it allow the author of the post to select the right answer. if you clicked on the img it will do a request...
the request will update the reply to be the right answer reply (* similar to stackoverflow.com)
the problem is when I do that, it always send me to the top of the page. I think it refreshs.
I want to avoid refreshing or sending me to the top of the page. I want it to do nothing but the request.
some people told me the solution is javascript. but how ? because I can't with javascript do requests nor sql updates ... ?
JavaScript can make requests to the server without refreshing the page. Usually, a library such as jQuery is used to make the process easier.
In your example, JavaScript needs to do two things:
Tell the server (php/mysql) what answer was selected as correct so that future visitors see the change
Update the client (browser) to show the change.
That should be enough to get you started - you are going to need to learn quite a bit. Read the docs at jquery.com and search for code examples.
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I'm working with PHP and I want to scrape some data from any website. But I have a problem. I scrape data but these items number are 48. But I know that page has 11K items. Rest of datas extend when you scroll and you get new bunch of datas (48 items).
I'm scraping with simple_html_dom. How can I manipulate scroll and get data ?
Thanks! :)
Sounds like the missing data is loaded via ajax.
Check the Network tab in the Developer Console (by pressing F12). Take a look at the URL which is being called (and the response), and edit it to your needs. Then call this URL instead of the one you are taking now.
It is impossible by this way.
But if you need to scrap this data you can send requests to endpoints which return lazily loaded data. You must research js code of target site.
p.s.
If you want to use really hard approach, you can research browser emulating.
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so I have a shopify website. And shopify sometimes give me a visitor log kind of like this:
"A user from has visited your website,
First page visited: homepage (22 seconds)
About us (1 minute)
Product page (2 minutes)"
I was wondering how I would go about creating something similar to this in php/js.
Thanks in advance!
You can instead use Google Analytics, it has in depth analytics on visitors. Its just about embedding JS code in your page and you're good to go. If you build your own code in any language, I'm pretty sure you will end up writing tonnes of codes.
To answer your question,
1.Create a web socket connection from your page to backend.
2.Pass event codes like clicks, refresh, session ids etc on user actions. Your JS can fire them up with an active web socket connection. It is pretty much light weight.
To store this information, I would suggest to use NoSql.
Hope this helps!
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Personally I would do this with PHP but maybe someone has an pro/contra for doing this with JavaScript:
I (will) fetch a few song details (about ten per page load) from Soundcloud
afterwards the statistic (played this week/total, liked this week/total etc.) will be displayed in a table
That's it - nothing special.
I can solve it like this:
let PHP do the stuff and render the whole page at once
This will of course take some time before the page is rendered.
Is there any advantage of doing this with JavaScript? I can only think of:
the page renders faster (with the disadvantage that the results may not be displayed instantly)
I'd say that doing it via JavaScript will actually take longer, as you'll have to connect again. Although, it may give an illusion of "being faster" (though I doubt it'll be noticeable).
I suppose it might depend on your usage cases too.
How are you handling authentication with SoundCloud?
I would honestly go the jQuery route.
Use a $.post() call, and within your success statement, loop through the json and append it to a table. This way, you can do something like pagination, which can update your table without needing to refresh the page.
Do it serverside and pre-load the page. The soundcloud API should not be the bottleneck here so reducing a request or two is worth it.
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Okay, bear with me. Part of my job is filling out online forms for customers who call in. In these forms there are all kinds of useful information that is hidden in input tags. I would like to make my own page that would extract and display all this useful information. I would also use this page to count the number of times I submit the form throughout the day.
The way I currently have it set up it is in a frameset. The left frame has links to the different forms we fill out, and when I click on one the external form is populated in the right frame. Javascript would be perfect for the job except that my frame is not located on the same server as the forms.
I stink at PHP. Not gonna lie. So i'm not looking for any hand-outs but any pointers would be great.
For example you may check out the forms on http://www.youcangetacar.com and you may use the pin code "A101" or you can check out what I have so far at http://customertrack.host-ed.me/
Make a page that cURL’s the page that is passed to it via url(curl.php?url=http://www.google.com) and then you dont have trouble with same domain policy.
Don’t forget to string replace relative urls with absolute urls.
eg, action="/submit/form.php" must become action="http://www.domain.com/submit/form.php"
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I want to display an add comment button(like in here or FaceBook) for all of the users' posts.
As you can see in here, if you click "add comment" button, small input box opens and your comment appears right below where you add it with smaller size than normal posts.
I am confused about which language would be the best for this. I know a little about JavaScript and jquery but i think doing it with php is not possible. An idea or example to do that would be greatly helpful.
JavaScript shows the form field, than makes an Ajax call to the server when the person clicks the add content button.
The server saves the content to the database, and returns a success message.
If successful, the JavaScript shows the comment and hides the form fields.
JavaScript and jquery its a client side technologies. Php is a server side. You need a proper database design and can choose any sever technology you like.