I'm working in PHP to allow users to delete content and I want "delete" to be displayed in text(like a hyperlink) instead of a submit button, however, I don't want to use an actual hyperlink. Think how in most forums when you delete a comment it's generally text saying "delete comment" instead of a submit button.
I'd like to avoid using GET in this case because it's for deleting content. I understand OOP so I don't need an explanation of how it works.
Is there any way to do this with text saying "delete" (not a button) and then use objects to pass it to a function, instead of using a hyperlink to pass values?
Here's what I'm currently using to display the link, however, I use get to retrieve the values, which I would really like to avoid.
<td><? echo $request['username']; ?></td>
<td>Delete</td>
Since GET is to get/retrieve data, you should use POST to POST updates to the server (i.e. deleting a record).
You can either use a submit button, and style it to look like a link
in CSS (best)
Or you could use an actual hyperlink and use JavaScript/jQuery to submit it for you to the server (not ideal).
I suggest you use the first one if you must use links. However, there's nothing wrong with using <button>s:
Semantically, hyperlinks are supposed to lead the user to a different page, where a button is supposed to make something happen.
It makes more sense to use a button rather than a link in this case.
Please consider that.
Related
I'm displaying tabular data populated via loop from a database.
I know that I could edit/delete etc in the usual manner, where
Edit Record
But I would really like to do this using the modal-message feature of jquery.
However, what I can't seem to figure out is how to indicate to the modal-message window/div the correct record number from the database (whereas in php, I'm simply using the print function.
Is it feasible to set maybe an onClick event that sets a variable ($id) to equal whatever the $row['abstract_id'] number is?
The idea being that when I click on the Edit button, I can put php within the div and it will call up the correct record.
EDIT for clarity: I don't want to actually edit it, it's to pull up the text of the abstracts, which are too big to fit in the tabular format (but there are too many abstracts to give each submission its own page).
The key here is how I can pass the record id from the database/php side to the javascript side even if it's setting/resetting some variable. I thought about using .load(read_abstract.php) but then realized that I don't think that .load(read_abstract.php?id=' . $row['abstract_id']') would work- and don't know what the JS equivalent would be (or if it exists).
You can move the id into a data attribute in the HTML tag:
echo '<span class="edit-button" data-abstract-id="'.$row['abstract_id'].'">edit</span>'
Then in the modal, you'll be able to reference it with:
jQuery('.edit-button').click(function() {
id = jQuery(this).attr('data-abstract-id');
});
I'm making a page which shows data, which is quite enormous.Tried pagination on it but didn't work the way I wanted. I'm looking for, something like "See more results", which on clicking will increase size of the page. Further, is it possible to do it with some limit on content to be shown on every click, like on every click it should show, say 10 or 15 rows ?
The best way to do this, in my opinion, is to cut the text and load just part of it with PHP. In this way the initial page won't be heavy. Then with a ‘Read more...’ button you can send an ajax request (with jQuery, maybe using the function load() function) you can get additional text, which will be appended in a div after the current text. Additionally, if you want to retrieve just some lines each time you press the button, you can check with jQuery how many div are already added (just adding a class to your new divs, you can check this just with $('#NameOfTheparent div.classOfTheNewDivs').length) and pass the variable to PHP, during the ajax request (so it won't be $('newDiv').load('something.php') but $('newDiv').load('something.php?var=numberOfDivAlreadyLoaded').
Well, this is the concept. :P
in my opinion, you need something like this:
http://andylangton.co.uk/articles/javascript/jquery-show-hide-multiple-elements/
Okay I'm not really sure how to approach this. I have a user-generated post board where people post, it drops down onto a list of a bunch of posts. When you click on the ID number of the post it will bring you to a separate page with just that post and the comments on the post. I want it so when you hover over the href it drops down something that tells the user there are x amount of comments on this post. This way people know if there is comments without switching pages and also being able to be able to click the href still and go to the postid page.
I assume some ajax/jquery/javascript would be used to accomplish this but since I'm fairly new to ajax and jquery I'm not certain how this would be done. Thank you!
For a hover effect, it would be better if that information was already stored on the page and just hidden. Then when the user does hover, you can just un-hide it and have it positioned where you want, and then hide it again when their mouse leaves the area. Using AJAX requests for this purpose would waste away a lot of HTTP requests for such a tiny amount of information.
Really, you could do the hover effect using pure CSS if you wanted too (I would).
Since a hover happens fairly often, I wouldn't use it as the default event to fire an AJAX-request. This would increase the HTTP-traffic enormous. See if you can fetch this information when the page is build (and put it in then) or use something else like a "preview"-button for the event.
Anyways, this would be the basic workflow if you want/need to use AJAX:
Write a PHP-script (or any other language you use) which fetches the number of comments (and what else you want to display) from the database (or where your data is stored).
This script should then be called via AJAX (with $.ajax() from jQuery for example). As the expected return-type you would then use json.
The script which fetches your data would then create an object, use PHP's json_encode()-function to encode this object to JSON and echo it out.
This JSON-object will then be available in the success-method of the ajax()-method from jQuery. Then, you can access its members (e.g. the comment-count).
I just setup some pagination for a search, and the search uses POST variables to define what to search for etc. In my URL I can set the pagination offset like this search/OFFSET, and my links in the pagination link there correctly. However, when I click a link all POST variables vanish even if I explicitly set them so I can use them in the next script. I'm using codeigniter and I have GET turned off and really don't want to store these 5-6 values in a session since then it will get all clumsy.
Does clicking a link fully reload the page and delete POST variables?
Thanks
Yes, clicking a link creates a GET request so wouldn't keep any of the POST data. Although it's technically possible to do so with javascript, that's a bad idea.
This is an entirely appropriate use of GET, please read this fuller explanation.
Yes, clicking a link removes all the POST variables.
Do you have access to change your php page that receives the request? You might want to adjust your variables there to accept either GET or POST:
$defaultvalue='';//change this to '' or NULL or whatever you want
$searchQuery = (isset($_POST['s']) ? $_POST['s'] : (isset($_GET['s'])?$_GET['s']: $defaultvalue));
Then your php page will be better equipped to handle either GET or POST
POST data will only be present during the original request (i.e. it does not persist between requests). If you want data to persist, use sessions. However, it is common practice to use GET for search queries and pages.
You could use an incredibly ugly workaround and set a form full of hidden fields to submit when you click a link. I really wouldn't recommended it though.
You should be able to create a form that submits some set of post variables to the action parameter with the get variables. So the form should submit a post request to http://www.somedomain.com/FormSubmit.php?pag=1&sort=asc This would submit the post values of that form along with the get values of the string. If you can change your link to a form button, you should be good to go.
I want to make a webpage where an user can add the title from a book he has read. These changes are reflected in real time on a list that contains all books he has introduced on the database, without the need to press any "reload" button. By example: there is no need to refresh (F5) the page to see the last book added.
I don't know if I can do this in PHP or in any other language, so I would like to know which is the best suited for something like this.
Thank you.
I think you are looking for Ajax. Would be able to asynchronously update the section of the page (the post in this case) without the need for page refresh.
You will want to do this with javascript, using the onchange event, and for a discussion on this you can look at: Call Javascript onchange event by programatically changing textbox value.
Basically, you react to the data being changed, then just send it immediately over using ajax to the server, but, you need to be aware of two things.
First, how will you handle errors, such as there is no book with that title, or the length is too long. I tend to put the error message in or by the place where they had the bad data.
The other is that you need to pass back the id when the data was inserted, so that when they change it again you can just do an update, so you will need to store that. I tend to put the database id I need in the element id, but you can keep it in an array in javascript, since it will maintain state for you.